P0040 P0040 code definition P0040 indicates that there is an issue with the oxygen sensor sensor 1 circuit. This code can be in conjunction with P0041 What the P0040 code means P0040 is a specific code indicating a problem with...
Hi there. The code p0040 (https://www.yourmechanic.com/article/p0040-obd-ii-trouble-code-oxygen-sensor-1-bank-1-by-spencer-clayton) is for an O2 sensor connectors are being swapped. Make sure the O2 sensor connectors aren’t swapped. This can happen when work has been previously performed. Also, check for unplugged or damaged connectors, as...
