C1239
ABS Hydraulic Pressure Differential Switch Input Open Circuit
C1239 is an OBD-II diagnostic trouble code meaning: ABS Hydraulic Pressure Differential Switch Input Open Circuit. Common causes: broken or damaged sensor wiring harness, oxidation of sensor contacts. Estimated repair cost: $56–167.
Symptoms
- The ABS indicator on the dashboard is on
- Disabling the ABS system
- Incorrect operation of the anti-lock braking system
Causes
- Broken or damaged sensor wiring harness
- Oxidation of sensor contacts
- Differential pressure sensor malfunction
- Problems with the ABS control unit
How to Fix
- Check the integrity of the sensor wiring harness
- Clean the sensor contacts from oxidation
- Check sensor resistance
- If necessary, replace the differential pressure sensor
- Check the operation of the ABS control unit
Related codes
FAQ
What does the C1239 code mean?
C1239 is an OBD-II diagnostic trouble code that indicates: ABS Hydraulic Pressure Differential Switch Input Open Circuit
What causes a C1239 error code?
The most common causes of C1239 include: Broken or damaged sensor wiring harness; Oxidation of sensor contacts; Differential pressure sensor malfunction; Problems with the ABS control unit.
How do I fix a C1239 diagnostic trouble code?
To fix C1239: Check the integrity of the sensor wiring harness. Clean the sensor contacts from oxidation. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1239?
Limited driving only, diagnose soon
How much does it cost to fix C1239?
The estimated repair cost for C1239 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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