I have an 08 Avenger with the 2.4L. It has about 135K miles. It starts up and idles just fine. However, attempting to drive down the highway is almost impossible. The car lacks power during acceleration. Once I’m up to 50+ mph, it will start to buck/jerk really bad and lose all power. The RPMs will start dropping, even though the gas pedal is on the floor, and eventually it will catch and start accelerating again. It will repeat this process over and over. It’s like it doesn’t recognize that I’m pressing the gas pedal.
I’ve replaced the coil packs, spark plugs and air filter. I also fixed the leaky valve cover.
Here are the codes it currently has:
P0172 – System too rich
P0171 – Fuel System Lean
P2004 – Intake manifold runner control stuck open
P2017 – Intake manifold runner position sensor/switch circuit high
P0135 – 02 heater circuit (sensor 1)
P0141 – 02 heater circuit (sensor 2)
P0032 – H02S heater control circuit high (sensor 1)
P0038 – H02S heater control circuit high (sensor 2)
P0128 – thermostat rationality test
P0700 – transmission control system (MIL Request)
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