B0351 Diagnostic Trouble Code

B0351 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 B0351 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Faulty IMRC actuator/sensor

Repair Processes :

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code B0351 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 B0351.

Fortunately, B0351 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0351 Trouble Code For Specific Cars

B0351 Mg X80 Ambient Air Temperature Sensor Circuit
B0351 Austin-healey Sport Aux A/C Mode Position Reference Circuit Short to Ground
B0351 Renault Kadjar Glow Plug/Heater Circuit "B" Malfunction
B0351 Honda Nsx Rear Cargo Door Lock Circuit Short to Ground
B0351 Isuzu Trooper SCP (J1850) Invalid or Missing Data for Vehicle Motion
B0351 Lotus Elise S3 Traction Control Input Signal
B0351 Hyundai Ioniq SCP (J1850) Invalid or Missing Data for Charging System