P0170: Fuel Trim Malfunction

[diablo7877]

Hey all,

My friend has the check engine light code above... Any help diagnosing the problem would be appreciated... Thanks!

P0170: Fuel Trim Malfunction (Just saying it again in case you're lazy and didn't read the subject. )

-Sean

 

[diablo7877]

(scratch) Anyone!?

 

[Salmon_Rob]

ill look it up after my classes and get back to you

 

[diablo7877]

Alright, thanks man... Looking forward to your reply.

 

[Salmon_Rob]

http://www.ghg.net/dharrison/sae2012.htm

 

[diablo7877]

While I appreciate the link, that's info I already have... Do you know what might need to be replaced? It's obviously either something with the fuel delivery or the MAF, but I have a feeling her air sensor is fine...

 

[txmzdspd2gen]

ihad the same problem..ill try to remember what i did with it but mainly the thing i repplaced was the 02 sensor..did someither things...ill try to remember..its been a while..

 

[Salmon_Rob]

While I appreciate the link, that's info I already have... Do you know what might need to be replaced? It's obviously either something with the fuel delivery or the MAF, but I have a feeling her air sensor is fine...

i dont know what car, year, trim level you are talking about. if u give more specifics ill let u know

 

[Midnightblue97]

I replaced the front O2 sensor to fix that one.
But, when I got the diagnostic printout there were like 13 different things that could have been wrong.
Your results may vary.

 

[turbonium959]

P0170: Bank 1 - Fuel Trim Malfunction

Detection Condition:
Fuel injection closed loop correction and learning correction are above the specified value because of system malfunction.

Poosible Cause:
Fuel injector malfunction
Fuel pump malfunction
Fuel filter clogged
Fuel delivery hose clogged or leakage
Fuel return hose clogged
Pressure regulator malfunction
Pressure regulator control solenoid valve malfunction
Purge solenoid malfunction
PCV valve malfunction
Ignition coil malfunction
Distributor malfunction
High-tension lead malfunction
Spark plug malfunction
Leakage in intake-air system
Insufficient compression
Leakage exhaust system
MAF sensor malfunction
Engine coolant temperature sensor malfunction
TPS malfunction
Front O2 sensor malfunction
Vehicle speed sensor malfunction
Open or short circuit in wiring harness
Poor connection of connector
Vacuum hoses damaged or loose

I hope this helps.