P1870
Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure
P1870 is an OBD-II diagnostic trouble code meaning: Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure. Common causes: wear of transmission clutches, low transmission fluid level. Estimated repair cost: $56–278.
Symptoms
- Gear slippage when shifting
- Check Engine light comes on
- Gear shifting problems
- Reduced vehicle power
- 4x4 system not working correctly
Causes
- Wear of transmission clutches
- Low transmission fluid level
- Transfer case switch malfunction
- Wiring harness damage
- Problems with the transmission control unit
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the condition of transmission clutches
- Check transfer case switch
- Inspect the wiring harness for damage
- Carry out diagnostics of the transmission control unit
Related codes
Error P1870 by Vehicle Brand
FAQ
What does the P1870 code mean?
P1870 is an OBD-II diagnostic trouble code that indicates: Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure
What causes a P1870 error code?
The most common causes of P1870 include: Wear of transmission clutches; Low transmission fluid level; Transfer case switch malfunction; Wiring harness damage.
How do I fix a P1870 diagnostic trouble code?
To fix P1870: Check the level and condition of the transmission fluid. Diagnose the condition of transmission clutches. Check transfer case switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1870?
Do not drive — repair immediately
How much does it cost to fix P1870?
The estimated repair cost for P1870 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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