B20C3 Diagnostic Trouble Code

B20C3 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 B20C3 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 B20C3 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 B20C3.

Fortunately, B20C3 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B20C3 Trouble Code For Specific Cars

B20C3 Dodge Hemi Ignition Control (IC) Circuit Low Voltage
B20C3 Aston Martin Db2 Air Suspension RR Air Spring/Shock Solenoid Output Circuit Failure
B20C3 Jaguar C-type Seat Driver Forward Circuit Open
B20C3 Princess 2000 Fuel Rail Sensor In-Range Low Failure
B20C3 Zastava 750
B20C3 Hyundai Ix35 SCP (J1850) Invalid or Missing Data for Chassis Status Request
B20C3 Volkswagen Fusca Ride Control LF Shock Actuator Circuit Short To Ground