C0263
CAN Signal Not Received From ECM
C0263 is an OBD-II diagnostic trouble code meaning: CAN Signal Not Received From ECM. Common causes: broken or damaged can wiring harness, ecm malfunction. Estimated repair cost: $56–222.
Symptoms
- Incorrect operation of the dashboard
- Warning lamps come on
- Loss of communication with other modules
- Reduced efficiency of vehicle systems
Causes
- Broken or damaged CAN wiring harness
- ECM malfunction
- Short circuit in CAN circuit
- ECM power problems
- Corrosion of connector contacts
How to Fix
- Check the integrity of the CAN wiring harness
- Diagnose ECM power supply
- Check connections and connector contacts
- Replace damaged components if necessary
- Update ECM firmware (if required)
Related codes
Error C0263 by Vehicle Brand
FAQ
What does the C0263 code mean?
C0263 is an OBD-II diagnostic trouble code that indicates: CAN Signal Not Received From ECM
What causes a C0263 error code?
The most common causes of C0263 include: Broken or damaged CAN wiring harness; ECM malfunction; Short circuit in CAN circuit; ECM power problems.
How do I fix a C0263 diagnostic trouble code?
To fix C0263: Check the integrity of the CAN wiring harness. Diagnose ECM power supply. Check connections and connector contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0263?
Do not drive — repair immediately
How much does it cost to fix C0263?
The estimated repair cost for C0263 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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