P1856
Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery
P1856 is an OBD-II diagnostic trouble code meaning: Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery. Common causes: damage to transfer case wiring harness, short circuit in contact plate circuit. Estimated repair cost: $17–89.
Symptoms
- Check Engine light comes on
- Gear shifting problems
- Unstable all-wheel drive operation
- The transmission goes into emergency mode
- Reduced vehicle dynamics
Causes
- Damage to transfer case wiring harness
- Short circuit in contact plate circuit
- Contact plate 'C' faulty
- Transmission control module (TCM) problems
- Corrosion of electrical contacts
How to Fix
- Check the condition of the transfer case wiring harness
- Diagnose contact plate circuit 'C'
- Check contact plate resistance
- Replace damaged components if necessary
- Test the operation of the system after repair
Related codes
Error P1856 by Vehicle Brand
FAQ
What does the P1856 code mean?
P1856 is an OBD-II diagnostic trouble code that indicates: Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery
What causes a P1856 error code?
The most common causes of P1856 include: Damage to transfer case wiring harness; Short circuit in contact plate circuit; Contact plate 'C' faulty; Transmission control module (TCM) problems.
How do I fix a P1856 diagnostic trouble code?
To fix P1856: Check the condition of the transfer case wiring harness. Diagnose contact plate circuit 'C'. Check contact plate resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1856?
Limited driving only, diagnose soon
How much does it cost to fix P1856?
The estimated repair cost for P1856 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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