How to troubleshoot the old exhaust system of Skoda

Troubleshooting: Replace and correctly assemble the clamp spring of intercooler interface, clean the throttle valve, clear the fault code and start the test. The fault code no longer appears, reading the data stream, and the values of the air intake and throttle position sensors are within the normal range (Figure 4). A week later, I called back and found nothing unusual.

Review and summary: When the radiator was replaced in the outside comprehensive repair shop, the quick interface at the intercooler was disassembled, but the clamp spring was not assembled correctly, resulting in slight air leakage. In addition, the accelerator of the car was dirty, so the engine control unit found that the value was wrong in a specific state, so it reported the above four fault codes. However, the incorrect assembly of the quick-connect clamp spring of the intercooler is the real reason why the control indicator light of the exhaust emission system lights up this time.