Fuel Composition Sensor (P0178) - SOLVED

[RAMurphy]

On my way into work this morning my check engine light came on. Finished my drive to work, she drove fine with no symptoms at all. Parked and checked the code and was surprised by the P0178 code. I cleared the code. A little research appears to be in my immediate future.

 

[MassHoe04]

At least the fuel composition sensor looks to be a relatively cheap and easy replacement.

 

[RAMurphy]

Concur, will check/read out wires but surely would not be surprised if the sensor is going bad after 20 years on the vehicle and nearly 300K (4300 miles to go) miles on her.

 

[rockola1971]

Concur, will check/read out wires but surely would not be surprised if the sensor is going bad after 20 years on the vehicle and nearly 300K (4300 miles to go) miles on her.

I would not doubt that its bad at that age.

 

[RAMurphy]

Yep, read out the wires last night. Ordered sensor, should arrive on Thursday.

 

[MassHoe04]

Love it when the diagnosis is uncomplicated and repair is easy!

 

[Mudsport96]

Has mpg taken a hit? Sometimes when they fail it goes full alcohol reading so on regular it way over fuels. And timing can get too far advanced, so take it easy driving it.

 

[RAMurphy]

Has mpg taken a hit? Sometimes when they fail it goes full alcohol reading so on regular it way over fuels. And timing can get too far advanced, so take it easy driving it.

It's hard to tell about gas millage taking a hit since I still have over a half tank of gas and I did just complete the TBSS intake install and installed the upgraded BBP tune for this upgrade just days before the P0178 code. Thank you for the advice on driving it easy. No major plans in driving anywhere - just back and forth to work - about 10 miles each way.

 

[RAMurphy]

My part should arrive today, I plan on installing it on Friday. I filled up this morning and I have taken a bit of a hit on gas mileage - nothing major. Could be the the compensator or the new intake/throttle body and the way I was driving based on this upgrade. This was before @Mudsport96 reply. Now I'm babying it.

 

[RAMurphy]

Have replacement part in hand. I really want to get this part installed - so tired of seeing that check engine light on. If I can get off work tomorrow early, I might change it tomorrow.