OBD code P0354 indicates a problem with ignition coil 4 in the ignition coil circuit.
Symptoms include the engine light being on, lack of power, hard starting, engine hesitation, and rough idle.
The issue is commonly caused by a faulty ignition coil, open/shorted harness, poor electrical connection, or a faulty ECM.
This is a serious issue that should be addressed promptly.
To fix it, inspect the wiring harness, connectors, and components for any damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 6.67 (Out of 10) |
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Symptoms of the p0354 OBD Code
The vehicle may experience rough idling or misfiring with fault code P0354.
- With OBD code P0354, the Engine Light will be ON.
- Lack/Loss of Power can be experienced.
- The engine may be harder to start.
- Engine hesitation may occur.
- Rough engine idle can be noticed.
Causes of the p0354 OBD Code
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Possible reasons for fault code P0354 include ignition coil circuit issues or faulty ignition coil.
- P0354 can be caused by a Faulty Ignition Coil 4.
- An open or shorted Ignition Coil 4 harness.
- A poor electrical connection in the Ignition Coil 4 circuit.
- A Faulty Engine Control Module (ECM).
Fixing Error Code p0354 Step By Step
Replace the ignition coil for fault code P0354.
- To fix OBDII code P0354, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, focus on the ignition coil for cylinder 4, checking for any signs of damage or wear.
- Test the ignition coil using a multimeter to ensure it is functioning correctly.
- If the ignition coil is faulty, replace it with a new one.
- Clear the fault codes using an OBDII scanner and test drive the vehicle to verify the repair.
Cost Of Fixing p0354 Fault Code
Diagnosing and repairing fault code P0354 typically involves testing and replacing the ignition coil.
The cost to diagnose and fix OBD code P0354 typically ranges from $75 to $150, based on an estimated repair time of 1. 0 hour.
Factors like shop rates and the complexity of the repair can influence the final cost.
Details of the p0354 OBD Code
Fault code P0354 indicates an ignition coil D primary/secondary circuit malfunction on cylinder 4.
OBD code P0354 means that a malfunction has been detected in ignition coil D primary/secondary circuit.
This code is triggered by the Engine Control Module (ECM) when it detects a problem with the ignition coil D circuit.
The ECM monitors the primary and secondary circuits of the ignition coil to ensure proper operation and spark delivery to the corresponding cylinder.
If a fault is detected in the ignition coil D circuit, the ECM will set code P0354.
Mechanic’s Tech Notes
Code P0354 indicates an ignition coil D primary/secondary circuit malfunction on cylinder 4.
To diagnose OBDII code P0354, which indicates an ignition coil D primary/secondary circuit malfunction, start by checking the wiring harness and connectors for any damage or corrosion.
Use a voltmeter to test the power and ground connections to the affected ignition coil.
Verify the coil’s resistance with a multimeter to ensure it falls within specifications.
If the wiring and coil are in good condition, the issue may lie with the engine control module (ECM) or the ignition coil driver circuit.
Use a scan tool to monitor live data and check for any abnormal readings.
If necessary, perform a reflash of the ECM to address any softwarerelated issues.
FAQ
OBD code P0354 means Ignition Coil 4 circuit malfunction. Symptoms include Engine Light ON, lack of power, hard starting, engine hesitation, rough idle. Check coil, harness, connections for issues.
Common symptoms of OBD code P0354 include Engine Light ON, lack of power, hard starting, engine hesitation, and rough idle. Possible causes: faulty Ignition Coil 4, wiring issues. Fix: Inspect wiring harness and connectors for damage.
Diagnose and fix OBD code P0354 by checking Ignition Coil 4, its harness, and connections for faults. Inspect wiring for damage or poor connections.
Wrap Up
If your check engine light is on and your engine is running rough, you may have OBDII code P0354. This code typically indicates a problem with the ignition coil D primary/secondary circuit.
Possible causes include a faulty ignition coil, damaged wiring or connectors, or a poor electrical connection.
To address OBDII code P0354, start by inspecting the wiring and connectors related to ignition coil D.
Look for any signs of damage, corrosion, or loose connections.
Test the ignition coil for proper function and replace if necessary.
Ensure all electrical connections are secure to resolve the issue effectively
