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TuningBot DTC Database · v4.37.15

P0312 Cylinder 12 Misfire Detected

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainIgnitionDriveability: LimitedOBD2

What P0312 means

P0312
Cylinder 12 Misfire Detected Generic · ignition Data confidence 90%

The control module detected crankshaft speed fluctuations consistent with combustion misfire (Cylinder 12).

Symptoms

  • Possible rough running and loss of power
  • MIL illuminated or flashing under load
  • Possible increased emissions

Possible causes

  • Engine mechanical fault
  • wiring
  • ignition/fuel system
  • injector
  • ECT/MAF sensor
  • ECM

Recommended checks

  • Read misfire counters per cylinder
  • Check freeze frame conditions
  • Swap-test coil/plug between cylinders where applicable
  • Check injector operation and cylinder balance
  • Perform compression test if electrical checks pass

Related and nearby codes

How to read P0312

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

312

Specific fault index within the subsystem.

Frequently asked questions about P0312

What does P0312 mean?

Cylinder 12 Misfire Detected. The control module detected crankshaft speed fluctuations consistent with combustion misfire (Cylinder 12).

Is P0312 generic or manufacturer-specific?

P0312 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P0312 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

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