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Hi I have system lean in both bank Car : yukon 07 I checked live data LTFT : 14 STFT : -5 This value at 2500 rpm At idle : LTFT : 9.4 STFT : -.8 Any idea ?

Thanx all ..

I supprised that my old mad was bad but no trouble code detected !

Yep .. I put 2 used maf ,, bad luck they are both never fix the problem .. So i took the third one and it was fine

Problem solved !! Bad air mas sensor ! No problem on injectores .. The air mass was bas and no codes ! Thank u everybody

anybody could help ?

hi .. i have got strange problem with tahoe 05 i just replace spark plugs + wires + air mass sensor . engine hesitation .. misfire .. white smoke .. there is smell of non burn fuel i put my scan tools .. there is only p0300 ! then there is p0171 .

hi all ,,, I am working on chevy Tahoe ltz 5.3 /2010 .. 100,000 KM only . the problem is reduce power engine ! white smoke ! smell a gas ! I put my scanner and there is codes : p2178 system too rich p0087 fuel rail regulator and p0089 ( low and high pressure codes )...

hi all .. iam working on gmc yukon 04 5.3L the car got : service ride light on . and service tire monitor on , i put my scantools .. there is c0292 fault in stored DTC . car condition : new aftermarket rims ( R 20 ) 285 - 50 new rear suspension OEM , the compressor is...

Thanx a lot

Advise me to change 4 sensors ?

So i will change the cap today ,, and i think first clean the o2 sensor then i will give u update

So start to change the CAT or p0455 could be cause of the other code ? Coz the car is run strong with no lack of power

No answer !

Hi .. I have tahoe 08 5.3 l Replace spark plugs + wire set . Change air filter ,, oil engine and gear Clean throttle .. Put techron on tank for injector cleaner. now im getting p0420 + p0455 ! Plz help :)