Error code

OBD2 P0294

OBD2P0294
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cylinder 12 Injector Circuit Low.

Severity

moderateCan be driven, but performance will suffer and may cause additional engine damage if not addressed.

Summary

P0294 indicates a low voltage issue with the fuel injector circuit for cylinder 12 in the powertrain system.

Symptoms

  • Engine knock or pinging
  • Reduced engine performance, especially during acceleration
  • Decreased fuel efficiency

Common Causes

  • Faulty fuel injector (cylinder 12)
  • Corroded or loose electrical connectors in the fuel injector circuit
  • Wiring harness issues between the fuel injector and control module
  • Low battery voltage affecting the entire system

Diagnosis

  1. Inspect electrical connectors for corrosion or looseness
  2. Check wiring harness continuity and resistance
  3. Verify fuel injector operation using a voltmeter

Fixes

  • Replace faulty fuel injector or clean it with a direct injector flushing kit

FAQ

What should I do if the P0294 code persists after cleaning the fuel injector?

If cleaning does not resolve the issue, replace the faulty fuel injector.

Can other codes be present with P0294?

Yes, related codes such as P0312 (misfire in cylinder 12) or P0296 (fuel-related problem in cylinder 12) may also appear.

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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