OBD-II Generic Error Code P0350: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
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Error Code
P0350
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P0350 indicates a problem with the ignition coil's primary or secondary circuit. This can cause misfires, poor performance, and even prevent your engine from starting. This guide will help you diagnose and fix the issue step by step.
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Tools You'll Need

How to Fix Error Code P0350

  1. Inspect Coil and Wiring

    Ensure the engine is off and cool before inspecting ignition components.

  2. Check Connector Pins

  3. Test Coil Resistance

    Read the multimeter manual to ensure correct settings.

  4. Check Power and Ground

    Do not touch live wires; use insulated probes.

  5. Replace Faulty Coil(s)

    Disconnect the battery negative terminal before replacing.

Parts You May Need

Ignition coil(s)
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Ignition coil(s)
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Ignition coil(s)
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Ignition coil(s)
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When to Call a Professional

If you've replaced the coils and the code returns, or if you lack the tools or confidence to perform electrical tests, take your vehicle to a certified mechanic. They can perform advanced diagnostics like checking the ECM signal.

Frequently Asked Questions

What does error code P0350 mean?
P0350 means the engine control module (ECM) has detected a malfunction in the ignition coil's primary or secondary circuit. This can cause misfires, rough idling, and reduced fuel economy.
Can I drive my car with a P0350 code?
It's not recommended. Driving with a faulty ignition coil can cause misfires, damage the catalytic converter, and reduce performance. Have it repaired as soon as possible.
How much does it cost to fix P0350?
Costs vary, but a single ignition coil replacement typically costs $50-$200 for parts plus labor. Replacing all coils may cost $300-$800.
Is P0350 the same as P0350-P0359?
No. P0350 is a generic code for the ignition coil circuit malfunction. Codes P0351-P0359 specify a particular cylinder (e.g., P0351 = Cylinder 1).
Will a bad battery cause a P0350 code?
A weak battery may cause low voltage to the ignition coils, potentially triggering a P0350 code. Check battery voltage (should be around 12.6V) and replace if needed.

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