B12AE Diagnostic Trouble Code

B12AE 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 B12AE 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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code B12AE 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 B12AE.

Fortunately, B12AE is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B12AE Trouble Code For Specific Cars

B12AE Saab 9-x Ignition Tamper Circuit Failure
B12AE Datsun 1200 Heater Coolant Temp sensor circuit Short to GND
B12AE Zil 4104 Seat Belt Switch Circuit Failure
B12AE Dort Roadster Ignition Tamper Circuit Short To Battery
B12AE Alvis Crested Eagle Air Bag Safing Sensor Output Circuit Short To Ground
B12AE Mazda Atenza Transmission Transfer Case Contact Plate Power Short To Battery
B12AE Opel Olympia Door Ajar LR Circuit Short To Ground