B1975 Diagnostic Trouble Code

B1975 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a B1975 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed.

Process Tips

Diagnostic trouble code B1975 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B1975.

Fortunately, B1975 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1975 Trouble Code For Specific Cars

B1975 Mg Td All Doors Unlock Relay Circuit Failure
B1975 Chevrolet Corvette C5 Driver Sliding Door Ajar Circuit Short to GND
B1975 Ford E-series Memory #1 output Short to Ground
B1975 Gn Vitesse Park Lamp Relay Coil Short to Battery
B1975 Hyundai Tucson Iii
B1975 Ssangyong Tivoli Lamp Headlamp Input Circuit Open
B1975 Bristol 450 Crankshaft Position Sensor A Circuit High Input