What does code P1234 mean?

Q: What does code P1234 mean?

Injector Circuit Cylinder 5 Intermittent. P1234 on a Chrysler vehicle means the powertrain control module (PCM) has detected an intermittent fault in the electrical circuit for fuel injector number 5. The PCM monitors injector current and voltage; when the signal drops out or spikes erratically, it flags this code because the injector is not being commanded consistently.

DTC codes / Chrysler codes / P1234

P1234 · ChryslerInjector Circuit Cylinder 5 Intermittent

P1234 on a Chrysler vehicle means the powertrain control module (PCM) has detected an intermittent fault in the electrical circuit for fuel injector number 5. The PCM monitors injector current and voltage; when the signal drops out or spikes erratically, it flags this code because the injector is not being commanded consistently.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.