B20E3 Diagnostic Trouble Code

B20E3 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 B20E3 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Some aftermarket accessories and performance modifications

Repair Processes :

Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. 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.

Process Tips

Diagnostic trouble code B20E3 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 B20E3.

Fortunately, B20E3 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B20E3 Trouble Code For Specific Cars

B20E3 Daimler Dk Headlamp Relay Circuit Failure
B20E3 Hyundai Azera SAI System Incorrect Downstream Flow Detected
B20E3 Renault Grand Espace Glow Plug Circuit High Side, High Input
B20E3 Porsche Cayman Type 987 Fuel Pump Monitor Circuit High Input
B20E3 Dodge Lancer Ignition Key-In Circuit Failure
B20E3 Mitsubishi Montero Aux A/C Mode Position Reference Circuit Short to Battery
B20E3 Lamborghini Murcielago Solar Radiation Sensor Circuit Short To Battery