Possible causes – Air leak near HO2S– Faulty HO2S– HO2S harness is open or shorted– HO2S circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Exhaust leak– Fuel pressure low– Vacuum leak– Engine mechanical condition Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty Front Oxygen A/F Sensor 11– Front Oxygen A/F Sensor 11 harness is open or shorted– Front Oxygen A/F Sensor 11 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection When is the code detected? The test fails if the Powertrain Control
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) CADILLAC
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty O2 Sensor– High fuel pressure– Faulty Mass Air Flow (MAF) Sensor– O2 Sensor harness is open or shorted– O2 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) AUDI
Possible causes – Faulty O2 Sensor– High fuel pressure– Faulty Mass Air Flow (MAF) Sensor– O2 Sensor harness is open or shorted– O2 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty Rear O2 Sensor– Rear O2 Sensor harness is open or shorted– Rear O2 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty Swirl Control Valve Control Position Sensor– Swirl Control Valve Control Position Sensor harness is open or shorted– Swirl Control Valve Control Position Sensor circuit poor electrical connection– Faulty Swirl Control Valve When is the code detected?
Possible causes – Faulty Swirl Control Valve Control Position Sensor– Swirl Control Valve Control Position Sensor harness is open or shorted– Swirl Control Valve Control Position Sensor circuit poor electrical connection– Faulty Swirl Control Valve When is the code detected?
Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1137 Description Lack Of HO2S Switch Sensor Indicates Lean is one of the definitions for the P1137; however your vehicle’s manufacturer may have a different definition for the P1137