Error code

OBD2 P0212

OBD2P0212
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Injector Circuit/Open - Cylinder 12.

Severity

highThe vehicle may be drivable but should not be driven long distances due to potential engine damage.

Summary

P0212 indicates an issue with the fuel injector circuit for cylinder 12, meaning there's likely a problem with either the wiring or the injector itself.

Symptoms

  • Engine misfire
  • Engine stalls
  • Engine cranks but doesn't start

Common Causes

  • Failed fuel injector in cylinder 12
  • Faulty wiring in the injector circuit for cylinder 12
  • Problem with the PCM (injector driver) controlling cylinder 12

Diagnosis

  1. Perform a visual inspection of the injectors and connections.
  2. Check for misfires with a scan tool, looking at PIDs or Mode $06 data.
  3. Use a noid light to check if the control circuit to the injector is functioning properly.
  4. Test power to the injector using a test light and check continuity between PCM and injector.
  5. Measure resistance between terminals of the fuel injector and compare with manufacturer specifications.
  6. Consider using an oscilloscope for detailed waveform analysis if available.

Fixes

  • Replace faulty fuel injector or repair wiring issues.

FAQ

What should I do if my car has a P0212 code?

You should perform the diagnostic steps mentioned to identify whether it's an issue with the fuel injector or its wiring. If you're not comfortable doing this yourself, take your vehicle to a professional mechanic.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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