C0870
Control Module Voltage Reference
C0870 is an OBD-II diagnostic trouble code meaning: Control Module Voltage Reference. Common causes: wiring harness problems, control module malfunction. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of sensors
- Floating idle speed
- Check Engine Light Illuminates
- Reduced engine efficiency
Causes
- Wiring Harness Problems
- Control module malfunction
- Short circuit in the circuit
- Poor contact in connectors
How to Fix
- Check wiring harness for damage
- Check control module connectors
- Measure the reference voltage on the control module
- If necessary, replace the control module
Related codes
Error C0870 by Vehicle Brand
FAQ
What does the C0870 code mean?
C0870 is an OBD-II diagnostic trouble code that indicates: Control Module Voltage Reference
What causes a C0870 error code?
The most common causes of C0870 include: Wiring Harness Problems; Control module malfunction; Short circuit in the circuit; Poor contact in connectors.
How do I fix a C0870 diagnostic trouble code?
To fix C0870: Check wiring harness for damage. Check control module connectors. Measure the reference voltage on the control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0870?
Limited driving only, diagnose soon
How much does it cost to fix C0870?
The estimated repair cost for C0870 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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