How to Solve OBD Inspection Failure?
2 Answers
There are several solutions to address OBD inspection failure: 1. Clear the fault codes: If the fault codes indicate hardware issues, replace the damaged components and clear the fault codes after debugging. It is recommended to read the vehicle's fault codes before the inspection. 2. Visit a repair shop for diagnostics and fault code reset. 3. Try a different inspection lane. 4. Change the operator: Different operators may yield different results, so consider switching operators. 5. Switch inspection stations: You can request a refund and go to another inspection station. 6. Change the inspection line: Some lines may not function properly, so try switching to a different line.
Last time my car failed the OBD test during inspection, so I fixed it myself. First, I connected an OBD scanner to the port to read the specific trouble codes. For example, P0171 indicates a lean fuel mixture, which could be caused by a clogged air filter or an intake system leak. Then I disassembled and checked, and indeed the filter was dirty. Replacing it only cost twenty yuan. I also checked the oxygen sensor wiring and found a loose connector. After tightening it and clearing the trouble codes, I drove for half an hour to let the system self-diagnose. After completing these steps, the car passed the reinspection. Regular maintenance of the engine and emission system helps avoid last-minute issues.
