Having problems with your 2003 Chevrolet Silverado 1500 ?

Codes 2003 silverado

\015 Also have a 2003 silverado 4x4 4.8l "v" engine. I currently have 2 codes 171 bank 1 runs too lean & 174 bank 2 runs too lean. my tech says it's the intake manifold? does this make sense?\015 Posted / edited by AnonymousUser on : 19-02-2018

Answers :

Spay wd-40 where the intake meets the manifold while the truck is idling and if the idle speeds up there a leak. If it does it will %100 Determine a leak
Means that the O2 sensor has seen a condition of more air in the engine than it can supply fuel (there is only one bank on the zx2).... My guess is the PCV hose is broken ... Not remembering the motor in the zx2 right now hurts me.. but I've seen the break either on the valve cover gasket, or where it enters the intake (it sometimes is hidden underneath)
Repair Help & Product Troubleshooting for 2003 Chevrolet Silverado 1500

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