P186D
High Side 1 System Voltage Low Range Out
P186D is an OBD-II diagnostic trouble code meaning: High Side 1 System Voltage Low Range Out. Common causes: poor contact in control circuit, broken or damaged wiring harness. Estimated repair cost: $6–56.
Symptoms
- Incorrect operation of actuators
- Dips in engine power
- Check Engine Light Illuminates
- Unstable engine idling
Causes
- Poor contact in control circuit
- Broken or damaged wiring harness
- Control unit malfunction
- Short circuit in the circuit
- Low battery voltage
How to Fix
- Check the integrity of the wiring harness
- Check the contacts in the control circuit connectors
- Measure voltage in High Side 1 circuit
- Check the condition of the battery and generator
- If necessary, replace the control unit
Related codes
FAQ
What does the P186D code mean?
P186D is an OBD-II diagnostic trouble code that indicates: High Side 1 System Voltage Low Range Out
What causes a P186D error code?
The most common causes of P186D include: Poor contact in control circuit; Broken or damaged wiring harness; Control unit malfunction; Short circuit in the circuit.
How do I fix a P186D diagnostic trouble code?
To fix P186D: Check the integrity of the wiring harness. Check the contacts in the control circuit connectors. Measure voltage in High Side 1 circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P186D?
Yes, but get it checked soon
How much does it cost to fix P186D?
The estimated repair cost for P186D is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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