What is the fault code for the oxygen sensor?

1 Answers
DeSpencer
07/29/25 4:25pm
Oxygen sensor refers to a sensor that monitors exhaust gases, responsible for measuring the oxygen content in vehicle emissions. Normally, after the vehicle exhaust is emitted, the mixture sends a signal to the computer to determine the size of the oxygen sensor's fault code, allowing the computer to readjust the fuel supply. The fault codes for the oxygen sensor include: P0139 to P0147, specifically as follows: 1. P0134 indicates no signal from the upstream oxygen sensor. 2. P135 is a fault in the first sensor of the first group of the oxygen sensor's heating circuit. 3. P0141 indicates a fault in the oxygen sensor heater circuit.
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