Two problems related to check engine light on have been reported for the 2004 Chevrolet Monte Carlo. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Monte Carlo based on all problems reported for the 2004 Monte Carlo.
: the contact stated, intermittently, the vehicle stalled at any speed. Once, the battery light illuminated then the vehicle stalled. The other times, the check engine light illuminated prior to the vehicle stalling. The vehicle did restart each time. The dealership cleaned the map sensor connector; this did not correct the problem.
At 2700 miles it blew the engine. Replaced engine and drove home, whole front started on fire. The consumer was informed that the fire was from a gas leak in the pipe. The consumer felt that the fault was due to green chevy mechanics. Per invoice: the engine light had come on, found codes for engine misfire, cylinder #3, knock sensor melted, performed compression test, cylinder #3 showed zero compression, removed #3 spark plugs, electrode was gone, removed the engine, disassembled the engine down to the pistons, holes were present in the piston, cylinder walls were severely gouged and the engine assembly needed to be replaced.