B2373 Diagnostic Trouble Code

B2373 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 B2373 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Dirty air cleaner element Damaged DPF

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code B2373 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 B2373.

Fortunately, B2373 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2373 Trouble Code For Specific Cars

B2373 Koenig C Servo Motor Potentiometer Airintake Right Circuit Short To Ground
B2373 Mercedes A 200 ABS Functions Temporarily Disabled
B2373 Duesenberg J Illuminated Entry Relay Short To Ground
B2373 Secma Fun 440 Insufficient Coolant Temperature for Stable Operation
B2373 Hyundai H100 SCP (J1850) Invalid or Missing Data for Brakes
B2373 Subaru G3x Left Power Sliding Door Open/Close Output Circuit Short to Battery
B2373 Toyota Stallion Passenger Door Ajar Circuit Short To Battery