2006 Grand Cherokee 4.7L P0700 Code: Unstable Temperature Gauge Despite Thermostat and Cooling System Checks

Model: 2006 Grand Cherokee Fault Code: P0700 Posted: 2017-09-27 08:48

My 2006 Jeep Grand Cherokee Limited with a 4.7L engine (WK model) is experiencing an unstable temperature gauge reading—showing both cold and hot markings while driving. I've already replaced the thermostat and inspected the cooling system, including radiator and hoses, but the issue persists. When checking via OBD-II, no refrigeration-related error codes appear; only P0700 is detected. The temperature needle fluctuates significantly, making it difficult to gauge engine operating temperature accurately. I'm seeking advice on possible causes or troubleshooting steps for this specific P0700 code in a 2006 Grand Cherokee, especially since the cooling system appears functional.