B0170 Diagnostic Trouble Code

B0170 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 B0170 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
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.
Faulty IMRC actuator/sensor

Repair Processes :

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. 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. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code B0170 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 B0170.

Fortunately, B0170 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0170 Trouble Code For Specific Cars

B0170 Plymouth Pronto Evaporative Emission Control System Vent Control Circuit Shorted
B0170 De Dion Bouton 6 Hp HO2S Heater Resistance (Bank 2 Sensor 2)
B0170 Opel Crossland X Digital TRS Failed to Transition States in KOEO / KOER
B0170 Gmc Yukon Park Lamp Flash Relay Circuit Short to Battery
B0170 Fiat 520 Lamp Brake Warning Output Circuit Failure
B0170 Nissan Gloria Clutch Position Sensor Circuit Low Malfunction
B0170 Jeep Cherokee Seat Driver Rear Down Switch Circuit Failure