U18AD
Transmission Range Control Module Lost Communication With Electronic Brake Control Module On Chassis Expansion CAN Bus
U18AD is an OBD-II diagnostic trouble code meaning: Transmission Range Control Module Lost Communication With Electronic Brake Control Module On Chassis Expansion CAN Bus. Common causes: broken or damaged can bus wires, poor contact in module connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- The car goes into emergency mode
- Incorrect operation of the gearbox
- Problems with the braking system
- Loss of engine power
Causes
- Broken or damaged CAN bus wires
- Poor contact in module connectors
- Transmission control module (TRCM) malfunction
- Electronic Brake Control Module (EBCM) malfunction
- Problems with module power supply
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean contacts in TRCM and EBCM connectors
- Check power supply of modules
- Scan modules for errors
- If necessary, replace faulty modules
Related codes
FAQ
What does the U18AD code mean?
U18AD is an OBD-II diagnostic trouble code that indicates: Transmission Range Control Module Lost Communication With Electronic Brake Control Module On Chassis Expansion CAN Bus
What causes a U18AD error code?
The most common causes of U18AD include: Broken or damaged CAN bus wires; Poor contact in module connectors; Transmission control module (TRCM) malfunction; Electronic Brake Control Module (EBCM) malfunction.
How do I fix a U18AD diagnostic trouble code?
To fix U18AD: Check the integrity of the CAN bus wiring. Inspect and clean contacts in TRCM and EBCM connectors. Check power supply of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18AD?
Do not drive — repair immediately
How much does it cost to fix U18AD?
The estimated repair cost for U18AD is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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