Questions & Answers for: Jeep Grand Cherokee po463

po463 fuel level sensor circuit voltage too high. how to fix the fuel gauge was going crazy from full tank to empty constantly. but now its stable. sheuld I replaced fuel pump and sensor? Hello. There

98 jeep grandcherokee code PO138, PO141 & PO463 P0138 - O2 Sensor Circuit High Voltage Bank 1 Sensor 2 The rear heated oxygen sensor (or sensor 2), after three way catalyst (manifold), monitors ...