2001 Jeep Cherokee Q&A
2001 Jeep Cherokee Question: RE:Code P0201 & P0301. Why are these coming up intermittently?
cold start,runs rough until norm operating temp reached. The motor will surge rhythmically when brought up to 2000/2500 rpm-when cold @ start-up. After warm the motor displays no other symptoms. @ present it takes appx 12-15 min to warm-up once warm........ok until it gets cold again, then repeat the warm-up. chg'd coolant sensor, 02sensors are good.MAT/MAP not ck'd yet. Any clues? - claymore
The P0201 indicates an injector fault on cylinder #1. The P0301 indicates a misfire on cylinder #1. If the injector isn't spraying, it will cause a misfire, so concentrate on the P0201 and when fixed, the P0301 will go away. Causes for the P0201? Most likely a broken wire to the injector, poor connection at the injector or a bad injector. I have seen a few Engine Control Modules cause that code, but not as often as the other possibilities. - Autohaus Lake Norman