C1A52
Driving Support ECU Communication Abnormal
C1A52 is an OBD-II diagnostic trouble code meaning: Driving Support ECU Communication Abnormal. Common causes: open or short circuit in wiring harness, corrosion or poor contact of connectors. Estimated repair cost: $33–278.
Symptoms
- Warning LED on instrument panel
- Disabling assistance systems (lane keeping, automatic braking, etc.)
- Reduced vehicle dynamics
- Unusual behavior of security systems
Causes
- Open or short circuit in wiring harness
- Corrosion or poor contact of connectors
- Malfunction of the assistance systems control unit
- Problems with power or grounding of the unit
- Software glitches (requires firmware update)
How to Fix
- Check wiring harness and connectors for damage/corrosion
- Ring communication circuits between blocks
- Check power supply and grounding of the module
- Read extended fault codes with scanner
- If necessary, replace damaged wires or connectors
- Reflash the unit (if required)
- Replace the control unit (as a last resort)
Related codes
FAQ
What does the C1A52 code mean?
C1A52 is an OBD-II diagnostic trouble code that indicates: Driving Support ECU Communication Abnormal
What causes a C1A52 error code?
The most common causes of C1A52 include: Open or short circuit in wiring harness; Corrosion or poor contact of connectors; Malfunction of the assistance systems control unit; Problems with power or grounding of the unit.
How do I fix a C1A52 diagnostic trouble code?
To fix C1A52: Check wiring harness and connectors for damage/corrosion. Ring communication circuits between blocks. Check power supply and grounding of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1A52?
Do not drive — repair immediately
How much does it cost to fix C1A52?
The estimated repair cost for C1A52 is $33–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat