How serious is this DTC?

When a P2337 is stored, the cause must be diagnosed as soon as possible. Symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2337 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by a malfunction
• PCM or programming error

What are the troubleshooting steps for P2337?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as sparking, must be eliminated before a P2337 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2337 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2337 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location charts, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the wiring and associated connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty ignition wires/boots as the cause of a stored P2337.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

How serious is this DTC?

When a P2338 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2338 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes of this code may include:

• Faulty knock sensor
• Engine failure or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the troubleshooting steps for P2338?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before diagnosing a P2338.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2338 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test the vehicle until one of two things happens: the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2338 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the wiring and associated connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty spark plug wires/boots as the cause of a stored P2338.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2338 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.

How serious is this DTC?

When a P2339 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2339 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the troubleshooting steps for P2339?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2339 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2339 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2339 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location charts, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the wiring and associated connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty spark plug wires/boots as the cause of a stored P2339.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2339 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.

How serious is this DTC?

When a P2340 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2340 fault code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the troubleshooting steps for P2340?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2340 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2340 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2340 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty spark plug wires/boots as the cause of a stored P2340.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2340 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.

How serious is this DTC?

When a P2341 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2341 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the P2341 troubleshooting steps?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2341 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2341 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2341 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and the vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that has been cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty ignition wires/spark plug boots as the cause of a stored P2341.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2341 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock

How serious is this DTC?

When a P2342 is stored, the cause should be diagnosed as soon as possible. Symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2342 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the P2342 troubleshooting steps?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noise, such as knocking, must be eliminated before diagnosing a P2342.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2342 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2342 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing wires and spark plug boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty ignition wires/spark plug boots as the cause of a stored P2342.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2342 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knocking

How serious is this DTC?

When a P2343 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2343 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the P2343 troubleshooting steps?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noise, such as knocking, must be eliminated before a P2343 can be diagnosed.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2343 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2343 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing wires and spark plug boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty ignition wires/spark plug boots as the cause of a stored P2343.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2343 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knocking.

How serious is this DTC?

When a P2344 is stored, the cause must be diagnosed as soon as possible. Symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2344 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the P2344 troubleshooting steps?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2344 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2344 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2344 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the wiring and associated connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty ignition wires/boots as the cause of a stored P2344.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2344 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.

How serious is this DTC?

When a P2345 is stored, the cause must be diagnosed as soon as possible. Symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2345 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes

of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the troubleshooting steps for P2345?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2345 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2345 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it may provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2345 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.

Perform a visual inspection of the wiring and associated connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty spark plug wires/boots as the cause of a stored P2345.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2345 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.

How serious is this DTC?

When a P2346 is stored, the cause must be diagnosed as soon as possible. The symptoms contributing to the storage of this type of code can range from minimal to catastrophic.

What are some of the symptoms of the code?

Symptoms of a P2346 trouble code may include:

• Engine noise
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• There may be no distinctive symptoms

What are some common causes of the code?

Causes of this code may include:

• Faulty knock sensor
• Engine malfunction or incorrect fuel type
• Open or shorted wiring or wiring connectors
• Engine noise caused by component failure
• PCM or programming error

What are the P2346 troubleshooting steps?

Ensure the engine is filled to the appropriate level with the correct oil and is in good working condition. Actual engine noises, such as spark knock, must be eliminated before a P2346 diagnosis can be made.

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2346 code.

You can save time and trouble by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2346 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout diagrams, component location charts, wiring diagrams, and diagnostic flowcharts (related to the code and the vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that is cut, burned, or damaged. Scheduled maintenance includes replacing spark plug wires and boots. If the vehicle in question is beyond the recommended maintenance interval for a tune-up, suspect faulty spark plug wires/boots as the cause of a stored P2346.

After disconnecting the PCM, use the DVOM to check continuity in the knock sensor circuit. Since the knock sensor is usually screwed into the engine block, be careful not to burn yourself with coolant or oil when removing the sensor. Test continuity through the sensor and back to the PCM connector.

The P2346 code can usually be attributed to a PCM programming error, a faulty knock sensor, or engine knock.