2002 Jeep Grand Cherokee P0155 OBD2 Code: Location, Repair Cost, and Tools Needed
I'm experiencing a P0155 OBD2 diagnostic code on my 2002 Jeep Grand Cherokee. The code indicates a heater circuit fault in Bank 2, Sensor 1 (pre-catalytic converter). Can anyone confirm the exact location of this sensor? Is the repair difficult or expensive? What specialized tools are required for diagnosis and replacement? Thanks for your help.
1) Is this vehicle equipped with a 4.0L engine? 2) Does it meet California emissions standards? Anyway, the P0155 code points to a circuit issue — you should first inspect the wiring and connections. Answers to questions 1 and 2 would be helpful for accurate troubleshooting.