Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC U0155: Keyless Access Control Unit Lost Communication With Gauge Control Module
- Clear the DTCs with the HDS.
- Press the engine start/stop button to select the OFF, ACC, and ON mode.
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC U0155 indicated?
YES -Go to the gauge control module input test, and do all power, ground, and communication input tests (see GAUGE CONTROL MODULE INPUT TEST ). If the tests prove OK, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections at the gauge control module and the related units.
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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.