OBD-II Generic Error Code P2335: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
Error Code
P2335
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P2335 indicates a problem with the secondary circuit of ignition coil L (usually coil on cylinder 12 in larger engines). This typically causes misfires, rough idling, and reduced power. Our guide walks you through diagnosis and repair.
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Tools You'll Need

How to Fix Error Code P2335

  1. Scan and Confirm the Code

  2. Inspect Ignition Coil L and Wiring

    Disconnect the battery negative terminal before working on ignition components.
  3. Test Ignition Coil Primary and Secondary Resistance

    Work in a well-ventilated area and avoid sparks near fuel vapors.
  4. Check Spark Plug and Boot

    Allow engine to cool before removing spark plugs.
  5. Perform a Spark Test

    Keep flammable materials away. Do not touch high-voltage components while engine is cranking.
  6. Swap Ignition Coils (If Applicable)

    Use dielectric grease on coil boots during reinstallation.

Parts You May Need

Ignition coil (coil L)
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Spark plug (cylinder L)
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Spark plug boot
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Ignition coil (coil L)
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Spark plug (cylinder L)
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Spark plug boot
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Ignition coil (coil L)
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Spark plug (cylinder L)
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Spark plug boot
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Ignition coil (coil L)
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Spark plug (cylinder L)
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Spark plug boot
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When to Call a Professional

If you've replaced the ignition coil and spark plug but the code returns, or if you suspect a PCM (engine computer) fault, take your vehicle to a professional mechanic for advanced diagnostics.

Frequently Asked Questions

What does error code P2335 mean?
P2335 indicates a malfunction in the secondary circuit of ignition coil L. This is the coil responsible for the 12th cylinder in the firing order. It often results in misfires.
Can I drive with a P2335 code?
Driving with this code is not recommended as it can cause poor engine performance, increased emissions, and potential damage to the catalytic converter. It's best to repair promptly.
What causes P2335?
Common causes include a faulty ignition coil, damaged spark plug or boot, wiring issues, or a failing engine control module (PCM).
How much does it cost to fix P2335?
Costs vary: DIY replacement of an ignition coil can be $50-$150, plus a spark plug ($5-$20). Professional labor adds $100-$200. If the PCM is faulty, costs can exceed $500.
How do I locate ignition coil L?
Ignition coil L is the coil for the 12th cylinder in the firing order. Refer to your vehicle's service manual or look up the firing order diagram. On V12 engines, it's typically on the back of the engine.