C140A
Transfer Case Motor Performance
C140A is an OBD-II diagnostic trouble code meaning: Transfer Case Motor Performance. Common causes: worn brushes or motor commutator, problems with the wiring harness to the engine. Estimated repair cost: $111–556.
Symptoms
- Unstable all-wheel drive operation
- All-wheel drive warning light comes on
- Delayed drive mode switching
- Clicking or knocking noises from the transfer case area
Causes
- Worn brushes or motor commutator
- Problems with the wiring harness to the engine
- Corrosion of contacts or connectors
- Malfunction of the transfer case control unit
- Mechanical damage to gears or bearings
How to Fix
- Read engine operating parameters through a diagnostic scanner
- Check the condition of the connectors and wiring harness
- Test the resistance of the motor windings
- Inspect the mechanical part of the transfer case
- If necessary, replace the electric motor or control unit
Related codes
FAQ
What does the C140A code mean?
C140A is an OBD-II diagnostic trouble code that indicates: Transfer Case Motor Performance
What causes a C140A error code?
The most common causes of C140A include: Worn brushes or motor commutator; Problems with the wiring harness to the engine; Corrosion of contacts or connectors; Malfunction of the transfer case control unit.
How do I fix a C140A diagnostic trouble code?
To fix C140A: Read engine operating parameters through a diagnostic scanner. Check the condition of the connectors and wiring harness. Test the resistance of the motor windings. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C140A?
Do not drive — repair immediately
How much does it cost to fix C140A?
The estimated repair cost for C140A is $111–556. Actual cost depends on your vehicle, location, and labor rates.
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