If the O2 sensor isn’t reacting at all, it can be due to a dead sensor, a shorted or severed O2 signal wire, or, in some cases, a bad O2 reference ground.Ĭonventional O2 sensors have four wires: the two heater wires (one of which is grounded by the ECM/PCM to control the heater) and the two O2 sensor signal wires (one is a reference ground and the other is the actual O2 signal wire). The trouble code P0130 is closely related to the P0136 code in that the latter detects a similar problem but in a different location and sensor, particularly bank 1 sensor 2. ![]() The sensor this trouble code pertains to is the first sensor on bank 1 or the side of the engine where the #1 cylinder is located.
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