2004 Jeep Grand Cherokee P0222 Fault: Engine Shuts Off During Drive or Acceleration After Cooling Fan Replacement
Hello, I own a 2004 Jeep Grand Cherokee (4.0L engine, automatic transmission) that began experiencing intermittent engine shutdowns—either while driving or when coming to a stop. The issue worsens during acceleration. This started after the cooling fan was replaced. I've already replaced several components including the crankshaft position sensor, water pump, fuel pump relay, and the throttle position sensor (which triggered a P0222 code). After these replacements, no additional diagnostic codes appear on the scan tool, yet the engine continues to shut off or hesitate. When I turn the key, the check engine light flashes approximately 11 times, and the gauge lights illuminate briefly but do not remain active once the engine starts. The idle air control valve is next on my list for inspection. Despite two mechanics testing the vehicle with diagnostic equipment, they have been unable to identify any faults. I'm seeking advice—any insights into possible causes related to the P0222 code or other electrical/mechanical factors would be greatly appreciated. Thank you in advance for your help! P.S. I do not have a remote starter or additional electrical accessories; cruise control, A/C, and horn function normally.
Thanks for the details—just to confirm: is this a 2004 Jeep Grand Cherokee with the 4.0L V6 engine and automatic transmission? Do you have access to an OBD-II scanner that can read live data and clear/re-read codes? The P0220 code (throttle position sensor) should still be visible during diagnostics—can you confirm if it persists after scanning? Also, are there any aftermarket electrical components or a remote starter installed? These could interfere with the throttle signal. Please verify whether cruise control, A/C, and horn operate normally when the engine is running—this helps rule out broader electrical issues.