Having problems with your Jeep Grand Cherokee ?
P 0171 (m) - Grand Cherokee Jeep Cars & Trucks
PO171 refers to "system too lean - bank \012#1", This means that the upstream oxygen sensor detected too much oxygen in the exhaust. Cleaning out the MAF (mass air flow) housing and sensor will help eliminate the PO171 code. It's also necessary to clean the upper portion of the engine and fuel injectors, to make sure they are not clogged or "fouled." check for vacuum leaks and around intake manifold. spray around manifold with engine running, if it flares up you have a leak. in most cases. cleaning the MAF sensor does the trick !
Repair Help & Product Troubleshooting for Jeep Grand Cherokee
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