C1858
Differential Fluid Pressure
C1858 is an OBD-II diagnostic trouble code meaning: Differential Fluid Pressure. Common causes: differential fluid pressure sensor malfunction, wiring harness damage. Estimated repair cost: $56–222.
Symptoms
- Power Loss
- Strange noises coming from the differential area
- Handling problems
- Check Engine Light Illuminates
Causes
- Differential fluid pressure sensor malfunction
- Wiring harness damage
- Low differential fluid level
- Mechanical damage to the differential
- Differential fluid contamination
How to Fix
- Check the level and condition of the differential fluid
- Check the differential fluid pressure sensor and its circuit
- Repair mechanical faults of the differential (if necessary)
- Replace differential fluid and filter (if equipped)
- Reset the error code and take a test drive
Related codes
FAQ
What does the C1858 code mean?
C1858 is an OBD-II diagnostic trouble code that indicates: Differential Fluid Pressure
What causes a C1858 error code?
The most common causes of C1858 include: Differential fluid pressure sensor malfunction; Wiring harness damage; Low differential fluid level; Mechanical damage to the differential.
How do I fix a C1858 diagnostic trouble code?
To fix C1858: Check the level and condition of the differential fluid. Check the differential fluid pressure sensor and its circuit. Repair mechanical faults of the differential (if necessary). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1858?
Limited driving only, diagnose soon
How much does it cost to fix C1858?
The estimated repair cost for C1858 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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