U0074-88 Control Module Communication Bus "B" Off - Bus off: Action

2011 Jaguar XJ SuperchargedSECTION Action
  • Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the applicable SYSTEM WIRING DIAGRAMS and check the high speed CAN bus (chassis and powertrain) circuits for short circuit to ground, short circuit to power, open circuit, high resistance
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.