The OBD code P0351 indicates a problem with the ignition coil in cylinder 1. This affects the ignition system.
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, wiring harness issues, or a faulty Engine Control Module (ECM).
It is a serious issue that should be addressed promptly.
To fix it, inspect the ignition coil, wiring harness, and connectors for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 6.67 (Out of 10) |
Symptoms of the p0351 OBD Code
The vehicle may experience rough idling, misfires, or lack of power with fault code P0351.
- With OBD code P0351, the Engine Light will be ON.
- Lack/Loss of Power may be experienced.
- The engine may be harder to start.
- Engine hesitation can occur.
- Rough engine idle may be noticeable.
Causes of the p0351 OBD Code
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Fault code P0351 typically indicates an issue with the ignition coil primary/secondary circuit for cylinder 1.
- P0351 can be caused by a Faulty Ignition Coil 1.
- An open or shorted Ignition Coil 1 harness.
- A poor electrical connection in the Ignition Coil 1 circuit.
- A Faulty Engine Control Module (ECM).
Fixing Error Code p0351 Step By Step
Replace the ignition coil for fault code P0351.
- To fix OBDII code P0351, first, review the possible causes related to the ignition coil circuit.
- Visually inspect the wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Test the ignition coil for proper operation and replace if necessary.
- Clear the fault codes from the vehicle’s computer using a scan tool.
- Finally, test drive the vehicle to ensure the issue has been resolved.
Cost Of Fixing p0351 Fault Code
Diagnosing and repairing fault code P0351 typically involves testing and replacing ignition coil number 1.
The cost to diagnose and fix OBD code P0351 typically ranges from $75 to $150 per hour for labor rates, with an estimated repair time of 1. 0 hour.
The total cost depends on shop rates, complexity of the issue, and any additional parts or services needed.
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Details of the p0351 OBD Code
Fault code P0351 indicates an ignition coil primary/secondary circuit malfunction on cylinder 1.
OBD code P0351 means an ignition coil A primary/secondary circuit malfunction has been detected.
This code is triggered by the Engine Control Module (ECM) when it detects a fault in the primary or secondary circuit of ignition coil A.
The ECM monitors the primary and secondary circuits of the ignition coil to ensure proper operation and efficient spark delivery to the spark plugs.
Mechanic’s Tech Notes
For fault code P0351, check the ignition coil primary/secondary circuit for malfunctions.
To diagnose and fix OBDII code P0351, which indicates an ignition coil A 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 ignition coil.
Verify the coil’s resistance with a multimeter to ensure it falls within specifications.
If the wiring and connections are intact, the issue may lie with the ignition coil itself.
Consider swapping the ignition coil with another cylinder to see if the fault code follows.
If the problem persists, further diagnostics with a scan tool to monitor live data and perform component tests may be necessary to pinpoint the exact cause.
FAQ
Common symptoms of OBD code P0351 include Engine Light ON, lack of power, hard starting, engine hesitation, and rough idle. Possible causes: faulty ignition coil, wiring issues. Fix: Inspect wiring and connectors.
OBD code P0351 is typically caused by a faulty Ignition Coil 1, open/shorted harness, poor connection, or faulty ECM. Inspect and repair as needed.
Diagnose and repair OBD code P0351 by checking Ignition Coil 1, 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 P0351. This code typically indicates a problem with the ignition coil A primary/secondary circuit.
Possible causes include a faulty ignition coil, damaged wiring or connectors, or a poor electrical connection.
To address OBDII code P0351, start by inspecting the wiring and connectors related to ignition coil A.
Test the ignition coil for proper function and replace if necessary.
Ensure all connections are secure and free of corrosion to prevent future issues.
