C0645
Brake Pressure Sensor L Circuit/Open
C0645 is an OBD-II diagnostic trouble code meaning: Brake Pressure Sensor L Circuit/Open. Common causes: broken or damaged brake pressure sensor wires, malfunction of the pressure sensor itself. Estimated repair cost: $56–167.
Symptoms
- The ABS/ESP indicator on the dashboard is on
- Reduced ABS performance
- Unstable behavior of the ESP system
- Possible problems with braking
Causes
- Broken or damaged brake pressure sensor wires
- Malfunction of the pressure sensor itself
- Poor contact in sensor connectors
- Wiring harness damage
- ABS/ESP module malfunction
How to Fix
- Check the integrity of the wiring and connectors of the brake pressure sensor
- Check the resistance of the pressure sensor (compare with technical specifications)
- Inspect the wiring harness for damage
- If necessary, replace the brake pressure sensor
- Check the operation of the ABS/ESP module
Related codes
Error C0645 by Vehicle Brand
FAQ
What does the C0645 code mean?
C0645 is an OBD-II diagnostic trouble code that indicates: Brake Pressure Sensor L Circuit/Open
What causes a C0645 error code?
The most common causes of C0645 include: Broken or damaged brake pressure sensor wires; Malfunction of the pressure sensor itself; Poor contact in sensor connectors; Wiring harness damage.
How do I fix a C0645 diagnostic trouble code?
To fix C0645: Check the integrity of the wiring and connectors of the brake pressure sensor. Check the resistance of the pressure sensor (compare with technical specifications). Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0645?
Do not drive — repair immediately
How much does it cost to fix C0645?
The estimated repair cost for C0645 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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