P0189 Code - Fuel Temperature Sensor 'B' Circuit Intermittent

What Does P0189 Mean?

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Fuel Temperature Sensor "B" Circuit Intermittent

The Fuel Temperature Sensor tells the engine control module (PCM) the temperature of the fuel. When the PCM detects an implausible signal from the Fuel Temperature Sensor, the PCM will set code P0189.

engine code P0189	P0189 fix	obd P0189	dtc P0189
obd code P0189	obd2 P0189	P0189 car code	diagnostic code P0189
car code P0189	check engine code P0189	fehlercode P0189	P0189 fiat
codigo P0189	codigo falla P0189	P0189 kody b??dów	codigo de falla P0189

What are the common causes of P0189 ?

Fuel pump failure is by far the most common cause of this code setting condition. Other causes may include a defective fuel temperature/consumption sensor, open, shorted, or damaged wiring or connectors, or a faulty PCM.



How do you troubleshoot P0189 ?

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code P0189 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 P0189.

Fortunately, P0189 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

Searches related to P0189 - Fuel Temperature Sensor 'B' Circuit Intermittent

• p0188
• p0190