B2146 Diagnostic Trouble Code

B2146 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 B2146 diagnostic trouble code may include:

Fuel pressure too high
Diminished fuel efficiency
Rich or lean exhaust
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Faulty IMRC actuator relay (if equipped)

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. 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.

Process Tips

Diagnostic trouble code B2146 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 B2146.

Fortunately, B2146 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2146 Trouble Code For Specific Cars

B2146 Lancia Stratos Stability Control Inhibit Warning
B2146 Vale 8 Power Window Master Circuit Failure
B2146 Mercedes R 350 Accessory Delay Relay Coil Circuit Open
B2146 Maudslay 2-l Transmission Range Display Circuit Malfunction
B2146 Awz-zwickau P Aux Heater Overheat Sensor Circuit Open
B2146 Hertz D Passenger's Seat Forward Switch Circuit Short to Battery
B2146 Lamborghini Jarama Signal Link Short to Ground (Non SCP) / From NGV Module