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…
Tag: CADILLAC
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…
P1381 CADILLAC Misfire Detected – No Communication with Brake Control Module
Possible causes – Repair other codes first Tech description If the P1381 code is set with other codes, repair other codes first and then clear the code. When is the obd code mean? If a loss of communication occurs which causes the Powertrain Control Module (PCM) not to receive rough road information while DTC P0300…
P1684 CADILLAC Transmission Control Module Power Up Temperature Sensor Performance
Possible causes – Reprogram TCM and recheck code– Replace Transmission Control Module (TCM) Sensor/body assembly one piece Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1684 CADILLAC OBD Code Description The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly…
P1685 CADILLAC Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage
Possible causes – Reprogram TCM and recheck code– Replace Transmission Control Module (TCM) Sensor/body assembly one piece Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1685 CADILLAC OBD Code Description The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly…
P1686 CADILLAC Transmission Control Module Power Up Temperature Sensor Circuit High Voltage
Possible causes – Reprogram TCM and recheck code– Replace Transmission Control Module (TCM) Sensor/body assembly one piece Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1686 CADILLAC OBD Code Description The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly…
P1415 CADILLAC Secondary Air Injection System Bank 1
Possible causes – Secondary Air Injection check valve bank 2– Secondary Air Injection (AIR) pump electrical circuit fault – Blocked Secondary Air Injection (AIR) system – Faulty Secondary Air Injection (AIR) pump When is the obd code mean? The P1415 code is set when no O2 sensor voltage change is detected by the Engine Control…
P1416 CADILLAC Secondary Air Injection System Bank 2
Possible causes – Secondary Air Injection check valve bank 2– Secondary Air Injection (AIR) pump electrical circuit fault – Blocked Secondary Air Injection (AIR) system – Faulty Secondary Air Injection (AIR) pump When is the obd code mean? The P1416 code is set when no O2 sensor voltage change is detected by the Engine Control…
P1639 CADILLAC PCM 5 Volt Reference Voltage Circuit Condition
Possible causes – Sensor using 5 volt reference line shorted to ground– Circuit short to ground When is the obd code mean? If the voltage is out of tolerance, the PCM will set DTC P1639. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1639 CADILLAC OBD Code Description The powertrain control module…