U135E
Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1
U135E is an OBD-II diagnostic trouble code meaning: Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1. Common causes: broken or damaged lin bus wires, corrosion or poor contact in connectors. Estimated repair cost: $17–89.
Symptoms
- Incorrect operation of the gearbox
- Check engine light comes on
- No gear shift
- Loss of engine power
- Switching the box to emergency mode
Causes
- Broken or damaged LIN bus wires
- Corrosion or poor contact in connectors
- Transmission control module (TCM) malfunction
- Problems with module power supply
- Engine control module (ECM) malfunction
How to Fix
- Check the continuity of the LIN bus wires between the ECM and TCM
- Inspect connectors for corrosion and damage
- Check TCM power and ground
- If necessary, replace damaged wires or connectors
- Diagnose the ECM and TCM modules
Related codes
FAQ
What does the U135E code mean?
U135E is an OBD-II diagnostic trouble code that indicates: Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1
What causes a U135E error code?
The most common causes of U135E include: Broken or damaged LIN bus wires; Corrosion or poor contact in connectors; Transmission control module (TCM) malfunction; Problems with module power supply.
How do I fix a U135E diagnostic trouble code?
To fix U135E: Check the continuity of the LIN bus wires between the ECM and TCM. Inspect connectors for corrosion and damage. Check TCM power and ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U135E?
Do not drive — repair immediately
How much does it cost to fix U135E?
The estimated repair cost for U135E is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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