Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty camshaft position sensor
• Camshaft position sensor harness is open or shorted
• Poor electrical connection in the camshaft position sensor circuit
• Faulty Engine Control Module (ECM)

Description

The camshaft position sensor is an electronic device used in an engine to record the rate at which the camshaft spins. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of the camshaft (intake) to identify a particular cylinder. The camshaft position sensor detects the position of the piston. The sensor system consists of a rotating part, typically a disk, as well as a static part, the sensor itself.
When the engine is rotating, the high and low parts of the teeth cause a change in the gap with the sensor. The changing gap results in a change in the magnetic field near the sensor. The change in the magnetic field causes a change in the sensor voltage.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various commands for engine components instead, using the timing of the cylinder identification signals.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light ON (or Service Engine Soon Warning Light)
• Lack/loss of power
• Engine stalling

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty spark plug
• Faulty ignition coil
• Intake vacuum leak
• Faulty camshaft position sensor
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Under CARB/OBD regulations, the Engine Control Module (ECM) must determine if a misfire is occurring and also identify the specific cylinder(s) and severity of the misfire event and whether it is an emissions problem or damaging to the catalyst. To accomplish these tasks, the control module monitors the crankshaft for acceleration losses during the firing segments of each cylinder according to the firing order.
The misfire/engine roughness calculation is derived from differences in the period duration (T) of individual gear segments. Each segment period consists of an angular range of 120° crankshaft angle that begins 78° before Top Dead Center (TDC).
If the expected period duration is greater than the allowed value, a misfire fault for the affected cylinder is stored in the ECM fault memory. Depending on the measured misfire level, the control unit will illuminate the Service Engine Soon light, may cut fuel to the particular cylinder, and may switch lambda operation to open loop. All misfire faults are weighted to determine whether misfires are emissions-related or damaging the catalyst.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty camshaft position sensor
• Camshaft position sensor harness is open or shorted
• Poor electrical connection in camshaft position sensor circuit
• Faulty Engine Control Module (ECM)

Description

The camshaft position sensor is an electronic device used in an engine to record the rate at which the camshaft spins. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disk, as well as a static part, the actual sensor.
When the engine is rotating, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field causes the sensor voltage to change.
When the crankshaft position (POS) sensor system becomes inoperative, the camshaft position sensor provides various commands for engine components instead, using the timing of cylinder identification signals

How to Repair

Check the “Possible Causes” listed above. Visually inspect the related wire harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light ON (or Service Engine Soon Warning Light)
• Lack/loss of power
• Engine stalling

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty ignition coil
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Ignition Coil Output Stage 2 Short To Ground is the generic description for Volkswagen code P1343, but the manufacturer may have a different description for your specific model and vehicle year. Currently, we have no additional information about Volkswagen OBDII code P1343.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential issues and there may be other causes.

• Faulty spark plug
• Faulty ignition coil
• Intake vacuum leak
• Faulty camshaft position sensor
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Under CARB/OBD regulations, the Engine Control Module (ECM) must determine if a misfire is occurring and also identify the specific cylinder(s) and severity of the misfire event, and whether it is an emissions problem or damaging to the catalyst. To accomplish these tasks, the control module monitors the crankshaft for acceleration losses during the firing segments of each cylinder according to the firing order.
The misfire/engine roughness calculation is derived from differences in the period duration (T) of individual gear segments. Each segment period consists of an angular range of 120° crankshaft angle starting 78° before Top Dead Center (TDC).
If the expected period duration exceeds the allowed value, a misfire fault for the affected cylinder is stored in the ECM fault memory. Depending on the measured misfire level, the control unit will illuminate the Service Engine Soon light, may cut fuel to the particular cylinder, and may switch lambda operation to open loop. All misfire faults are weighted to determine whether misfires are emissions-related or damaging to the catalyst.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty ignition coil
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Ignition Coil Output Stage 2 Short To B+ is the generic description for Audi P1344 code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we have no further information about the Audi P1344 OBDII code.

How to Fix

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty spark plug
• Faulty ignition coil
• Intake vacuum leak
• Faulty camshaft position sensor
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Under CARB/OBD regulations, the Engine Control Module (ECM) must determine if a misfire is occurring and also identify the specific cylinder(s) and the severity of the misfire event and whether it is an emissions problem or damaging to the catalyst. To accomplish these tasks, the control module monitors the crankshaft for acceleration losses during the firing segments of each cylinder according to the firing order.
The misfire/engine roughness calculation is derived from differences in the period duration (T) of individual gear segments. Each segment period consists of an angular range of 120° crankshaft angle that begins 78° before top dead center (TDC).
If the expected period duration is greater than the allowed value, a misfire fault for the affected cylinder is stored in the ECM fault memory. Depending on the measured misfire level, the control unit will illuminate the Service Engine Soon light, may cut fuel to the particular cylinder, and may switch lambda operation to open loop. All misfire faults are weighted to determine whether misfires are emissions-related or damaging to the catalyst.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty spark plug
• Faulty ignition coil
• Intake vacuum leak
• Faulty camshaft position sensor
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Under CARB/OBD regulations, the Engine Control Module (ECM) must determine if a misfire is occurring and also identify the specific cylinder(s) and severity of the misfire event and whether it is an emissions problem or damaging to the catalyst. To accomplish these tasks, the control module monitors the crankshaft for acceleration losses during the firing segments of each cylinder according to the firing order.
The misfire/engine roughness calculation is derived from differences in the period duration (T) of individual gear segments. Each segment period consists of an angular range of 120° crankshaft angle that begins 78° before Top Dead Center (TDC).
If the expected period duration is greater than the allowed value, a misfire fault for the affected cylinder is stored in the ECM fault memory. Depending on the measured misfire level, the control unit will illuminate the Service Engine Soon light, may cut fuel to the particular cylinder, and may switch lambda operation to open loop. All misfire faults are weighted to determine whether misfires are emissions-related or damaging to the catalyst.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

• Faulty ignition coil
• Ignition coil harness is open or shorted
• Poor electrical connection in ignition coil circuit

Description

Stage 2 Ignition Coil Output Short To B+ is the generic description for Volkswagen code P1344, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we have no other information about Volkswagen OBDII code P1344.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

Possible Causes

NOTE: The listed causes may not be a complete list of all potential issues and there may be other causes.

• Engine mechanical condition – Valve timing disabled
• The camshaft sensor or crankshaft sensor are loose on their mount
• Faulty camshaft position sensor
• Faulty crankshaft position sensor

Description

The crankshaft position sensor (CKP) is a permanent magnet generator, called a variable reluctance sensor. The sensor’s magnetic field is modified by a reluctance wheel mounted on the crankshaft which has seven machined slots, 6 of which are evenly spaced 60 degrees apart. The seventh slot is spaced 10 degrees after one of the 60-degree slots. The CKP sensor produces seven pulses for each crankshaft revolution. The pulse from the 10-degree slot is known as the synchronization pulse. The synchronization pulse is used to synchronize the ignition coil firing sequence with the crankshaft position. The CKP sensor is connected to the Powertrain Control Module (PCM) through a signal circuit and a low reference circuit.The camshaft position sensor (CMP) is triggered by a notched reluctance wheel integrated into the exhaust camshaft gear. The CMP sensor provides 6 signal pulses per camshaft revolution. Each notch or feature of the reluctance wheel is a different size for identification of each cylinder. This means the CMP and crankshaft position (CKP) signals are pulse width coded to allow the Powertrain Control Module (PCM) to continuously monitor their relationship. This relationship is used to determine the camshaft actuator position and control its phasing to the correct value. The PCM also uses this signal to identify the compression stroke of each cylinder and for sequential fuel injection. The CMP sensor is connected to the PCM through a signal circuit and a 12-volt low reference circuit.

How to Repair

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or engine maintenance warning light soon)
• Engine hard to start
• Engine stalls while driving