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mike
mike, UK Car Mechanic
Category: UK Car
Satisfied Customers: 107
Experience:  nvq level 3 in feild of subaru's for 5 years and own, own garage
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Po460 fuel level sensor circuit malfunction is this a serious fault

Customer Question

po460 fuel level sensor circuit malfunction is this a serious fault
Submitted: 5 years ago.
Category: UK Car
Expert:  Dave O'Neil replied 5 years ago.
hi there, can you give me more details please. year, make, model, engine size etc. cheers. dave.
Expert:  mike replied 5 years ago.

hello and welcome to justanswer.com

 

this is a common fault on some ford ie focus and mondeo's

 

although some people say pulling of the battery terminal will clear the code it doesnt Pulling the battery cable will NOT erase the code. That procedure is a thing of the past. Use a voltmeter to check the voltage readings with different fuel levels. Typical voltage is .9-2.45v with as goes from 25%-75% full. A high reading of 2.9v can be caused by a stuck gauge or open ground. If the reading doesn't change with fuel level, you either have a bad connection at the pump/fuel sending unit, or a bad sending unit in the tank.

 

HOWEVER

Pulling the battery cable will clear the code. At least on cars up to MY 2000. This also clears out all the learned adaptive behavior such as idle speed and fuel trims.

P0460 - Fuel Level Sensor Circuit Malfunction The PCM monitors the fuel level input (FLI) circuit for electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified fuel fill percentage in the fuel tank.

Empty fuel tank
Fuel pump (FP) module stuck open
Incorrectly installed fuel gauge
Damaged instrument cluster
CASE GND circuit open
FLI shorted to VPWR
Damaged PCM
Overfilled fuel tank
Fuel pump (FP) module stuck closed
Damaged fuel gauge
FLI circuit open
FLI circuit shorted to CASE GND or PWR GND
CSE GND shorted to VPWR

 

hpoe this helps and please leave possitive feedback if it has and click the accept tab.

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