Lost Communication With OBD Emission Monitor Module
The U0262 code means the vehicle's onboard diagnostic system has detected: Lost Communication With OBD Emission Monitor Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Emission readiness monitors not completing
- Failed emissions inspection
- Cannot retrieve I/M readiness status
- MIL light on with no retrievable codes
Probable Causes (Ranked by Likelihood)
- Failed emissions monitoring module Very High
- CAN bus communication error High
- ECM software issue Moderate
- Aftermarket tuner interference Low
Step-by-Step Diagnostic Procedure
-
Remove aftermarket tuning devices
-
Scan for pending emission codes
-
Test CAN bus at OBD port
-
Check ECM for software updates
Frequently Asked Questions
Can I drive with U0262?
Yes, but emissions testing will fail until resolved.
What causes U0262?
Often aftermarket tuners or a software issue in the engine control module.
Will U0262 fail my smog test?
Yes. Emission monitors must communicate properly to pass.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.