P1858
Transmission Transfer Case Contact Plate 'D' Circuit Failure
P1858 is an OBD-II diagnostic trouble code meaning: Transmission Transfer Case Contact Plate 'D' Circuit Failure. Common causes: open or short circuit in contact plate 'd' circuit, damage to transfer case contact plate. Estimated repair cost: $17–89.
Symptoms
- Check Engine light comes on
- Problems with switching all-wheel drive modes
- Unstable operation of the transfer case
- Reduced controllability on difficult road conditions
- Possible jerking when changing gears
Causes
- Open or short circuit in contact plate 'D' circuit
- Damage to transfer case contact plate
- Problems with the transfer case wiring harness
- Transfer case control unit malfunction
- Corrosion of contacts or connectors
How to Fix
- Check continuity of contact plate 'D'
- Inspect the contact plate for damage
- Check the condition of the wiring harness and connectors
- Test the transfer case control unit
- If necessary, replace the contact plate or repair the wiring
Related codes
Error P1858 by Vehicle Brand
FAQ
What does the P1858 code mean?
P1858 is an OBD-II diagnostic trouble code that indicates: Transmission Transfer Case Contact Plate 'D' Circuit Failure
What causes a P1858 error code?
The most common causes of P1858 include: Open or short circuit in contact plate 'D' circuit; Damage to transfer case contact plate; Problems with the transfer case wiring harness; Transfer case control unit malfunction.
How do I fix a P1858 diagnostic trouble code?
To fix P1858: Check continuity of contact plate 'D'. Inspect the contact plate for damage. Check the condition of the wiring harness and connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1858?
Yes, but get it checked soon
How much does it cost to fix P1858?
The estimated repair cost for P1858 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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