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Diagnostic trouble code P0308 Powertrain
Unverified Powertrain (P) Ignition / Engine

Cylinder 8 misfire detected

Cylinder 8 is misfiring.

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What P0308 means

Cylinder 8 is misfiring.

Symptoms you may notice

  • Rough idle
  • Loss of power

Possible causes

  1. Faulty plug or coil on cyl 8
  2. Injector fault
  3. Low compression

Causes are listed from most to least likely for this code. Confirm the actual cause with the diagnostic checks before replacing parts.

Checks to run

  1. Swap the coil
  2. Compression test

Tools you may need

OBD-II scanner
More Ignition / Engine codes →
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Verification and editorial notes

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This page has not been technically verified yet. Confirm the diagnosis and measurements in the workshop manual for your vehicle.

Diagnose before replacing. A diagnostic trouble code identifies the circuit or system the control unit flagged. It does not prove that a particular part has failed. Confirm the cause with the measurements and checks above, and follow the workshop manual for your exact engine before replacing parts or clearing codes.

Keep diagnosing

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