Dodge Error Codes
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DTC P0121
Throttle/Pedal Position Sensor A Range/Performance Problem
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DTC P0128
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
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DTC P0171 & P0174
Indicate issues related to the air-fuel mixture.
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DTC P0301-P0308
Individual cylinder misfires that caused by issues like a bad spark plug or coil, can also point to mechanical or fuel-related problems.
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DTC P0123
Throttle/pedal position sensor "A" is producing a voltage signal that is too high, suggesting a malfunction in the sensor circuit.
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DTC P0300
Indicates random cylinder misfires which, if left unresolved, can lead to long-term engine damage or catalytic converter failure.
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DTC P0401
EGR system is not functioning as intended, often due to carbon buildup, a stuck valve, or sensor failure.
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DTC P0420 & P0430
Catalytic converter system is not functioning efficiently on one or both banks of the engine.
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DTC P0440
General EVAP system malfunction, most often caused by a loose gas cap, leaks in the system, or faulty valves/sensors.
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DTC P0441
Indicates a problem with the vapor purge process in the EVAP system.
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DTC P0456
Small leak in the EVAP system, typically from a loose gas cap, tiny hose crack, or faulty valve.