P1348 Code – Cylinder 4 Misfire Detected at Startup

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)

P1348 Audi Code – Ignition Coil Power Output Stage 1 Open Circuit

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

Open circuit in ignition coil output power stage 1 is the generic description for Audi P1348 code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we have no other information about the Audi OBDII P1348 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)

P1348 BMW Code – Cylinder 4 Misfire During Start

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)

P1348 Isuzu Code – Variable Valve Timing System Fault Bank 1

Possible Causes

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

  • Blocked oil passage
  • Incorrect mechanical valve timing
  • Faulty camshaft or crankshaft position sensor
  • Incorrect oil viscosity

Description

Fault bank 1 of the variable valve timing system is the generic description for Isuzu code P1348, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no other information about the Isuzu OBDII P1348 code.

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

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

P1348 MINI Code – Cylinder 4 Misfire During Start

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

P1348 MINI Code Description

Under CARB/OBD regulation, 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 ignition segments of each cylinder based on 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.

P1341 Code Mazda – Camshaft Position Sensor “B” Circuit Range/Performance

Possible Symptoms

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

P1348 Volkswagen Code – Open Circuit in Ignition Coil Output Power Stage 1

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

The open circuit in ignition coil output power stage 1 is the generic description for Volkswagen code P1348, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we have no additional information about Volkswagen OBDII code P1348.

How to Fix

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)

Code P1349 – Variable Valve Timing System Malfunction, Bank 1

Possible Causes

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

  • Dirty or low engine oil
  • Valve timing
  • Oil control valve
  • Variable valve timing controller assembly
  • Engine control module (ECM)

Description

The Variable Valve Timing (VVT) system controls the intake valve timing to achieve proper timing in response to driving conditions. The engine control module (ECM) controls the oil control valve (OCV) to ensure correct intake valve timing, and the oil pressure controlled by the OCV is supplied to the VVT controller. The VVT controller then changes the relative position between the camshaft and crankshaft. Code P1349 is triggered when the valve timing does not change from the current valve timing or when the current valve timing is fixed.

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 engine maintenance warning light soon)

P1349 Code Audi – Open Circuit in Ignition Coil Power Output Stage 2

Possible Causes

NOTE: The listed causes may not be a complete list of all potential issues 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 power output stage 2 circuit open is the generic description for Audi P1349 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no other information about Audi OBDII code P1349.

Audi P1349 Code – Ignition coil power output stage 2 circuit open

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)

P1349 BMW Code – Cylinder 4 Misfire with Fuel Cutoff

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)

P1349 Code Chevrolet – Intake Camshaft Position System Conditions

Possible Causes

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

  • Faulty intake camshaft position sensor
  • Intake camshaft position sensor harness is open or shorted
  • Poor electrical connection in the intake camshaft position sensor circuit

Description

With the engine running, the engine coolant temperature sensor (ECT) input is above 158°F, VSS input is above 5 mph, the PCM did not detect a change in camshaft timing with the active CMP actuator, or the PCM detected that camshaft timing was corrected, either condition was met for 20 seconds.

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)