2007 Chrysler PT Cruiser Overheating with P0148 Diagnostic Code
I recently replaced the radiator and thermostat on my 2007 Chrysler PT Cruiser, but the vehicle continues to overheat—only during short city drives, not on long highway trips. After replacing the cooling fan tonight, a diagnostic code P0148 appeared. The fan activates when the heater is turned on, and I've confirmed the electrical connector is intact. However, the engine cooling fan does not appear to be functioning properly under load. Given that P0148 relates to fuel system pressure or sensor issues, I'm concerned about whether this code is accurate or if it might actually be a misdiagnosis—such as P0118 (engine coolant temperature sensor issue). What should I check next? Is there a known connection between the P0148 code and overheating in 2007 PT Cruisers?
Is this a turbocharged engine? Confirm that the diagnostic code is indeed P0148—this code typically relates to fuel system pressure or sensor issues. Could it be a misread code, such as P0118 (coolant temperature sensor)? The fan referenced here appears to be the heater blower fan—not the engine cooling fan. The engine cooling fan must be independently verified and tested for proper operation under load. Ensure that the fan is activated correctly when the engine reaches operating temperature.