DTC U1128 Cadillac

Fuel Injector Circuit Malfunction No. 5

Fuel Injector Circuit Malfunction No. 5

Description

Engine started, engine speed over 500 RPM, and the PCM detected the Injector 5 control circuit was in a high state when it should be low, or it was in a low state when it should have be high.

Cause and Solution

Check output signal for ECMCheck harness between injector and ECM connectorCheck injectorCheck power supply line

Video Guide

Duration: PT4M2S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: U1128
  • Brand: Cadillac
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