Tag: CADILLAC

U1255 CADILLAC Lost Communications

Tech description As with all loss of communication concerns, inspect the power, ground, and serial data circuits to the suspect module prior to replacing any parts. When is the obd code mean? U1255 is set when the control module does not receive a message that it was expecting from another control module, and does not…

P1130 CADILLAC HO2S Circuit Low Variance Bank 1 Sensor 1

Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1130 CADILLAC OBD Code Description The Heated Oxygen Sensor (HO2S) is monitored for switching. The test fails when the HO2S does not switch due to circuit or fuel at or exceeding a calibrated limit.

P1131 CADILLAC HO2S Circuit Low Variance Bank 1 Sensor 2

Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1131 CADILLAC OBD Code Description A Heated Exhaust Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of…

P1870 CADILLAC Transmission Component Slipping

Possible causes – Trailer towing may set code– Check transmission fluid level– Internal transmission fault Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1870 CADILLAC OBD Code Description Transmission is in 4th gear with Torque Converter Clutch (TCC) engaged and the Engine Control Moduel (ECM) has detected excessive slippage when comparing the…