How severe is this DTC?

When a P2318 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2318 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage from wildlife)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2318?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2318 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 P2318 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 has been cut, burned, or damaged. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.

How severe is this DTC?

When a P2319 is stored, the cause must be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2319 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2319?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2319 code.

You can save yourself time and trouble by searching for Technical Service Bulletins (TSBs) that match the recorded 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 P2319 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 has been cut, burned, or damaged. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the ground circuit corresponding to the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.

How severe is this DTC?

When a P2320 is stored, the cause must be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2320 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Bad spark plug wire or boot
• Faulty relay or blown fuse (fuse link)
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Faulty camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2320?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2320 code.

You can save yourself 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 P2320 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 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 bad ignition wires/spark plug boots as the cause of a stored P2320.

Spark plug boots that are torn, burned, or contaminated with fluid should be considered faulty. Access the junction between the ignition coil and the spark plug wire. Check for high-energy ignition (HEI) at the spark plug. If none is detected, disconnect the spark plug wire from the coil and see if there is HEI there. If there is HEI at the spark plug, suspect the spark plug is faulty or there is a PCM error. If there is no HEI at the spark plug but it is strong at the coil, suspect a bad spark plug wire or boot. If there is no HEI at the coil, suspect the coil is faulty. HEI must be tested (carefully) with the engine running.

How severe is this DTC?

When a P2321 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2321 fault code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2321?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2321 code.

You can save yourself time and trouble by searching for Technical Service Bulletins (TSBs) that match the recorded 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 P2321 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 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. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.

How serious is this DTC?

When a P2322 is stored, the cause must be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2322 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Faulty camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2322?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2322 code.

You can save yourself time and trouble by searching for Technical Service Bulletins (TSBs) that match the recorded 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 P2322 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 specific code and vehicle) 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. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.

How severe is this DTC?

When a P2323 is stored, the cause must be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2323 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Bad spark plug wire or boot
• Faulty relay or blown fuse (fuse link)
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Faulty camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2323?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2323 code.

You can save yourself 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 P2323 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 specific code and vehicle) 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/boots as the cause of a stored P2323.

Spark plug boots that are torn, burned, or contaminated with fluid should be considered faulty. Access the junction between the ignition coil and the spark plug wire. Check for high-energy ignition (HEI) at the spark plug. If none is detected, disconnect the spark plug wire from the coil and see if there is HEI there. If there is HEI at the spark plug, suspect a faulty spark plug or a PCM error. If there is no HEI at the spark plug but it is strong at the coil, suspect a bad spark plug wire or boot. If there is no HEI at the coil, suspect a faulty coil. HEI must be tested (carefully) with the engine running.

How serious is this DTC?

When a P2324 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2324 trouble code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (wildlife damage)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2324?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2324 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 P2324 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 has been cut, burned, or damaged. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or programming error.

How severe is this DTC?

When a P2325 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2325 fault code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2325?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2325 code.

You can save yourself 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 P2325 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 has been cut, burned, or damaged. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.

How severe is this DTC?

When a P2326 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2326 fault code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes of this code may include:

• Bad spark plug wire or boot
• Faulty relay or blown fuse (fuse link)
• Open or shorted wiring or wiring connectors (damage from wildlife)
• Faulty ignition coil
• Faulty camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2326?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2326 code.

You can save yourself 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 P2326 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 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 bad ignition wires/boots as the cause of a stored P2326.

Spark plug boots that are torn, burned, or contaminated with fluid should be considered faulty. Access the junction between the ignition coil and the spark plug wire. Check for high-energy ignition (HEI) at the spark plug. If none is detected, disconnect the spark plug wire from the coil and see if there is HEI there. If there is HEI at the spark plug, suspect a faulty spark plug or a PCM error. If there is no HEI at the spark plug but it is strong at the coil, suspect a bad spark plug wire or boot. If there is no HEI at the coil, suspect a faulty coil. HEI should be tested (carefully) with the engine running.

How severe is this DTC?

When a P2327 is stored, the cause should be diagnosed as soon as possible. The symptoms that likely accompany these codes will generally require immediate attention.

What are some of the symptoms of the code?

Symptoms of a P2327 fault code may include:

• Engine misfires
• Decreased engine performance
• Reduced fuel efficiency
• Other related codes
• Fuel injector operation for the affected cylinder may be disabled by the PCM

What are some common causes of the code?

Causes

of this code may include:

• Faulty relay or blown fuse (fuse link)
• PCM failure
• Open or shorted wiring or wiring connectors (damage caused by wildlife)
• Faulty ignition coil
• Defective camshaft or crankshaft sensor or wiring

What are the troubleshooting steps for P2327?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2327 code.

You can save yourself time and trouble by searching for Technical Service Bulletins (TSBs) that match the recorded 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 P2327 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 has been cut, burned, or damaged. Wiring on top of the engine is often damaged by wildlife trying to stay warm in cold climates.

Use the DVOM to test the voltage and ground circuits at the ignition coil in question. If no voltage is detected, check the system relay and associated fuses. Replace faulty relays and/or blown (or otherwise defective) fuses as needed.

If voltage and ground are detected at the coil, test the corresponding ground circuit at the PCM connector with the engine running. If a ground pulse is detected there, suspect an open circuit between the coil in question and the PCM. If no ground pulse is found there, suspect a faulty PCM or a programming error.