OBD-II Generic Error Code P0352: How to Fix It

Medium 30-60 minutes High Severity Verified June 2026
Error Code
P0352
Brand
OBD-II Generic
Product Type
automotive
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code P0352 indicates a problem with the primary circuit of ignition coil B. This means the engine control module (ECM) has detected an electrical malfunction in the coil's primary winding or its control circuit. If left unchecked, it can cause misfires, rough idling, and reduced fuel economy.
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Tools You'll Need

How to Fix Error Code P0352

  1. Safety First: Disconnect the Battery

    Always disconnect the battery before working on ignition components to avoid electrical shock.
  2. Locate Ignition Coil B

  3. Visually Inspect the Coil and Wiring

  4. Test Power Supply to the Coil

    Do not touch the multimeter probes while the key is on to avoid short circuits.
  5. Test Ground and Trigger Signal

  6. Swap Coils to Confirm

    Ensure the engine is cool before handling coils to avoid burns.
  7. Replace Faulty Coil or Repair Wiring

Parts You May Need

Ignition coil (for coil B)
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Wiring harness pigtail connector
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Ignition coil (for coil B)
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Wiring harness pigtail connector
Check Price on Amazon
Ignition coil (for coil B)
Check Price on Amazon
Wiring harness pigtail connector
Check Price on Amazon
Ignition coil (for coil B)
Check Price on Amazon
Wiring harness pigtail connector
Check Price on Amazon
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When to Call a Professional

If swapping the coil does not resolve the issue and you suspect an ECM fault or have no electrical experience, consult a professional mechanic. Advanced diagnostics may require a scope to check the ECM’s control signal.

Frequently Asked Questions

Can I drive with a P0352 code?
It's not recommended. The code indicates a misfire that can damage the catalytic converter and cause poor performance. Have it repaired as soon as possible.
What causes error P0352?
Common causes include a faulty ignition coil, damaged wiring or connectors, a blown fuse, or a failing ECM.
How much does it cost to fix P0352?
If it's just the coil, a replacement part costs $30-$120 and labor $50-$100. Wiring repairs can add $100-$200. ECM replacement can be $500-$1000.
What tools do I need to diagnose P0352?
You'll need an OBD2 scanner, a digital multimeter, and basic hand tools. A wiring diagram is also helpful.
Can a bad spark plug cause P0352?
While P0352 is specifically for the coil primary circuit, a faulty spark plug can cause excessive load on the coil, leading to premature failure. It's wise to inspect spark plugs as well.