October 22, 2021

Oxygen sensor failure analysis: failure code P0141

Background knowledge: The role of the oxygen sensor is to measure the oxygen content in the engine exhaust to correct the fuel injection volume, so that the engine can obtain the best air-fuel ratio. In the OBD fault code, you will often see the statement of which oxygen sensor in the first row. The first row refers to the row where cylinder 1 is located, and the remaining row is the second row. Regardless of the row, the first sensor always refers to the upstream oxygen sensor (front oxygen), and the second sensor always refers to the downstream oxygen s

October 22, 2021

Repair case: 2012 Honda Accord engine shakes severely, and acceleration is weak

A 2012 Honda Accord 2.0 sedan has a mileage of about 30,000 km. The engine idling jitter is serious, acceleration is weak, and the engine fault light is always on. The air-fuel ratio sensor is malfunctioning. 1. Repair process 1. Use HDS to detect, the fault code read is P2A00, air-fuel ratio (A/F) sensor S1 circuit range/performance problem, record and clear the fault code and test drive, the fault remains. So it was decided to start with the air-fuel ratio sensor to troubleshoot the fault according to the prompt of the fault code.