Marcus Hale 
U0100 Quick Answer · Lost Communication with ECM/PCM The U0100 code on a Dodge means another computer on the vehicle’s network lost contact with the engine computer (PCM) over the CAN bus — the data …
P0301–P0308 Quick Answer · Cylinder-Specific Misfire Detected A P0301 through P0308 code on a Dodge means one specific cylinder is misfiring — the last digit is the cylinder number, so P0301 is cylinder 1, P0305 …
P0700 Quick Answer · Transmission Control System Malfunction The P0700 code on a Dodge means the transmission computer (TCM) has detected a fault and asked the engine computer to turn on the check engine light. …
P0171 P0174 Quick Answer · System Too Lean The P0171 code on a Dodge means the engine is running too lean on Bank 1 — there’s too much air for the amount of fuel, and …
P0456 Quick Answer · EVAP System Small Leak Detected The P0456 code on a Dodge means the PCM has detected a very small leak in the EVAP system — the sealed network of hoses, valves, …
P0420 P0430 Quick Answer · Catalyst Efficiency Below Threshold The P0420 code on a Dodge means the PCM has decided the catalytic converter on Bank 1 is no longer cleaning the exhaust efficiently — “Catalyst …
P0300 Quick Answer · Random/Multiple Cylinder Misfire The P0300 code on a Dodge means the powertrain control module (PCM) has detected random or multiple cylinder misfires — combustion is failing in more than one cylinder, …
VIPER Model Guide · Dodge Viper Check Engine Light (1996–2017) A check engine light on a Dodge Viper is rarer than on the family Dodges — the 8.0L, 8.3L, and 8.4L V10 is a simple, …
NITRO Model Guide · Dodge Nitro Check Engine Light (2007–2011) A check engine light on a Dodge Nitro usually traces to a short list of faults this truck-based SUV is known for. The 3.7L PowerTech …
CALIBER Model Guide · Dodge Caliber Check Engine Light (2007–2012) A check engine light on a Dodge Caliber usually traces to one of a handful of well-known faults on the 1.8L, 2.0L, and 2.4L World …