U1262 - Communication Bus Fault

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

  • Faulty Powertrain Control Module (PC)
  • Harness is open or shorted
  • Circuit poor electrical connection
  • Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • U1262 Description

    This code indicates a communication issue (Bus+, Bus-) between the PATS/HEC/ICM and some other module. Do not perform PATS diagnostics if a no start is not reported of if theft indicator is not flashing rapidly at ignition RUN position. If the indicator is flashing, check to make sure the PCM is powered up and operating. If it’s not, continue with PCM diagnostics.
    OBDII Code U1262 - Communication Bus Fault - Engine-Codes.com

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