Tag: CADILLAC

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…

P0411 CADILLAC Secondary Air Injection System Insufficient Flow

Possible causes – Vacuum hoses damaged or pinched– Faulty Air Pump inoperative– Faulty Air Pump harness is open or shorted– Faulty Air Pump circuit poor electrical connection When is the obd code mean? The AIR system does not meet the expected flow rate during testing Symptoms – Engine Light ON (or Service Engine Soon Warning…

P0449 CADILLAC Evaporative Emission Vent Valve Solenoid Malfunction

Possible causes – Vacuum leaks, damaged hoses or improper routing– EVAP system – Check fuel cap, canister, valves or components– Faulty purge or vent solenoids– Check connector and wiring– Fuel saturated vapor canister– Failed EVAP vent solenoid When is the obd code mean? The Engine Control Module (ECM) has determined that a malfunction exists in…

U1000 CADILLAC Invalid or Missing Data for Primary Id

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? U10000 is set when the control module does not receive a message that it was expecting from another control module, and does not…

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…