Lost Communication With Fuel Vapor Canister Module
The U0263 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Fuel Vapor Canister Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $150 - $500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- EVAP system warning light on
- Fuel odor near vehicle
- Gas cap warning message
- Fuel tank pressure reading unavailable
Probable Causes (Ranked by Likelihood)
- Failed EVAP canister vent valve module Very High
- EVAP system wiring fault High
- Canister purge valve stuck Moderate
- CAN bus communication error Low
Step-by-Step Diagnostic Procedure
-
Check gas cap seal and tightness
-
Inspect EVAP canister vent valve
-
Scan EVAP module for codes
-
Test canister purge valve operation
Frequently Asked Questions
Can I drive with U0263?
Yes. This is an emissions issue, not a safety or drivability concern.
What causes U0263?
Usually a failed EVAP vent valve or wiring fault. Check the gas cap first.
How much does U0263 cost to fix?
Typically $150 to $500.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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