B3370 Diagnostic Trouble Code

B3370 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 B3370 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. 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. 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.

Process Tips

Diagnostic trouble code B3370 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 B3370.

Fortunately, B3370 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3370 Trouble Code For Specific Cars

B3370 Saturn Relay IMRC Input Error (Bank 1)
B3370 Smart Brabus Lamp ABS Warning Output Circuit Failure
B3370 Facel Vega Hk500 Injector Circuit Malfunction
B3370 Lancia Astura Speed Wheel Sensor LF Coherency Fault
B3370 Mg Rv Air Temperature External Sensor Circuit Open
B3370 Hyundai Ix35 SCP (J1850) Invalid or Missing Data for Chassis Status Request
B3370 Ac 10 A/C Refrigerant Temperature Circuit High