What causes p1391 code for 2000 grand cherakee?

Answer 1

The P1391 code for a 2000 Grand Cherokee indicates a problem with the camshaft position sensor (CMP) or the crankshaft position sensor (CKP). This code can be triggered by issues such as a faulty sensor, poor wiring or connections, or a malfunctioning engine control module (ECM). It may also occur if the timing between the camshaft and crankshaft is not properly synchronized. It's important to diagnose the specific components and wiring to determine the exact cause.