Chrysler 300 Fault Codes
You can find common Chrysler 300 fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Chrysler 300 Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Chrysler 300 has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Chrysler 300 Recalls »
Common 300 Fault Codes
These are the most common 300 fault codes that people are searching for.
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Catalyst Efficiency Low Fault Bank BLearn More Fixes
Misfire On Multiple CylinderLearn More Fixes
Exhaust Gas Recirculation Sensor A Circuit HighLearn More
Engine Oil Pressure Control Circuit Stuck OffLearn More
Transmission Control System MalfunctionLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Air Temperature Sensor High Out of Range FaultLearn More Fixes
Camshaft Position Sensor Signal Error FaultLearn More Fixes
Throttle Position Sensor High Out of Range FaultLearn More
Oxygen Sensor High Voltage *Codes* A DLearn More Fixes
Cooling Fan 1 Control Circuit MalfunctionLearn More
Intake Manifold Tuning Valve Control Circuit (Bank 1)Learn More
Engine Oil Pressure Sensor/Switch Circuit MalfunctionLearn More
Misfire Cylinder 1Learn More Fixes
Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 2Learn More
Oxygen Sensor System Too Lean Fault Bank ALearn More Fixes
Exhaust Gas Recirculation Circuit Range/PerformanceLearn More
Lost Communication With ECM/PCM "A"Learn More Fixes
Injector 3 Circuit FaultLearn More
Evap Purge Valve Incorrect Flow FaultLearn More Fixes
Incorrect Gear RatioLearn More
Torque Converter Clutch Circuit MalfunctionLearn More
Crankshaft Position Sensor A Circuit IntermittentLearn More
VRIS Solenoid '1' CircuitLearn More
HO2S Bank 1 Sensor 1 Signals Swapped in Key On Engine Running Self TestLearn More
Downstream Heated O2 Sensors SwappedLearn More
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position PerformanceLearn More
PRNDL Reverse Input Short Circuit To GroundLearn More
Alternator "B" Open (1.8L).Learn More
Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1Learn More Fixes
Oxygen Sensor Low Voltage *Codes* B ULearn More Fixes
Cooling System PerformanceLearn More
Battery Disconnected Within Last 50 StartsLearn More
Oxygen Sensor High Voltage *Codes* A ULearn More
Leak Detection Pump Solenoid CircuitLearn More
Exhaust Camshaft Position Actuator Circuit / Open (Bank 2)Learn More
Evaporative Emission Control System MalfunctionLearn More Fixes
Engine Oil Pressure Sensor/Switch Low VoltageLearn More
Lost Communication With Body Control Module ALearn More
Manifold Absolute Pressure/Barometric Pressure Circuit High InputLearn More
Camshaft Position Sensor Circuit IntermittentLearn More
Misfire Cylinder 4Learn More Fixes
Measurement Circuit OK Battery Voltage Low FaultLearn More
Oxygen Sensor Low Voltage *Codes* A DLearn More Fixes
Oxygen Sensor Slow Response *Codes* A DLearn More
High Speed CAN Communication BusLearn More Fixes
Lost Communication With Anti-Lock Brake System (ABS) Control ModuleLearn More
Lost Communication With Body Control ModuleLearn More
Oxygen Sensor Fuel Trim at Limit *Codes* A ULearn More
PCM Power Input Signal IntermittentLearn More
Oxygen Sensor High Voltage *Codes* B DLearn More Fixes
Line Pressure Solenoid SystemLearn More
P or N Range Signal or Clutch Pedal Position Switch Open or Short.Learn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass Air Flow Sensor Low Out of Range FaultLearn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Oxygen Sensor Low Voltage *Codes* A ULearn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
Oxygen Sensor System Too Rich Fault Bank ALearn More Fixes
Oxygen Sensor System Too Rich Fault Bank BLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Misfire Cylinder 5Learn More Fixes
Misfire Cylinder 6Learn More Fixes
- Manufacturer: Chrysler
About the 300
The Chrysler 300 is a luxury full-size offering from the American manufacturer. It first debuted in 2005 with the LX model, which was discontinued in 2010.
Chrysler brought the model back with the second-generation LD version in 2011.
The main difference between the LX and LD models is that the second generation was limited to only a sedan variant, while the first also had a station wagon layout.
Chrysler released a host of different versions. These trim options consist of the Base, Touring, Limited, 300C, SRT-8, and finally SRT. The last of these represents high-performance versions.
Chrysler released this model to compete with some other big names in the luxury sedan class. The most notable of these are the BMW 3 Series, Audi A4, Lexus ES, and Mercedes C-Class.
Stellantis announced its plans to discontinue the 300 and that the 2023 model will be its final year of production.
The most common fault code associated with the 300 is P0128, which represents an issue with the coolant thermostat temperature.
When the coolant temperature sensor detects a low temperature, it signals to the powertrain control module that the cooling system may not be operating properly, particularly the thermostat system.
The cooling system is one of the most vital found in any car. It is responsible for preventing the engine from overheating and also helps keep the engine running optimally.
If the cooling system is not reaching operating temperature, it can cause decreased performance from the vehicle. These may not be very noticeable though.
One of the best fixes for this problem is simply to check the thermostat to see if it is functioning properly. Another simple one is checking the coolant levels. It is important to ensure it is not too high or too low.
The next most popular fault code for the Chrylser 300 is P0456, which is logged when the onboard computer detects a potential small leak in the evaporative emissions control system (EVAP).
Problems with the EVAP system are notoriously hard to detect. The fact that this represents a small leak makes it even harder.
It is important to be thorough when it comes to looking for a leak in the system. Some mechanics will use a specialized diagnostic tool called a ‘smoke machine’ to help pinpoint any leaks.
The gas cap on a Chrysler 300 can occasionally come loose, which can cause this code. Be sure to check this first.
While not the most serious of fault codes, it is important to have this problem fixed to avoid fines from failed emissions tests.
Another common code for this model is P0430, which represents a problem with the catalytic converter in the second bank of the exhaust system.
Similar to any faults with the EVAP system, this issue can cause a failed emissions test. However, when it comes to problems with the catalytic converter, it is always fairly serious as these components are very expensive.
Thankfully, this code can simply be a result of faulty oxygen sensor circuits, rather than a failed catalytic converter.