You can find common Jeep Wrangler fault codes on this page that when clicked take you to a detailed description.
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Jeep Wrangler 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 Jeep Wrangler has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Jeep Wrangler Recalls »
Common Wrangler Fault Codes
These are the most common Wrangler fault codes that people are searching for.
Engine Oil Pressure Control Circuit Stuck OffLearn More
Engine Oil Pressure Sensor/Switch Circuit MalfunctionLearn More
Manifold Absolute Pressure/Barometric Pressure Circuit High InputLearn More
Engine Oil Temperature Sensor HighLearn More
Shift Solenoid A MalfunctionLearn More
Evaporative Emission Control System Leak DetectedLearn More
Throttle/Pedal Position Sensor/Switch A Circuit High InputLearn More
Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1Learn More
Ignition/Distributor Engine Speed Input Circuit MalfunctionLearn More
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)Learn More
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)Learn More
O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)Learn More
Engine Coolant Temperature Circuit High InputLearn More
Injector Circuit Malfunction - Cylinder 1Learn More
Transmission Over Temperature ConditionLearn More
Engine Is Cold Too LongLearn More
O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)Learn More
Throttle/Pedal Position Sensor/Switch A Circuit Low InputLearn More
Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance ProblemLearn More
Vehicle Speed Sensor Range/PerformanceLearn More
Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 2Learn More
Incorrect Gear RatioLearn More
Cooling Fan 2 Control Circuit MalfunctionLearn More
Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 2Learn More
O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)Learn More
Camshaft Position Sensor B Circuit Intermittent (Bank 2)Learn More
Transmission Range Sensor Circuit Range/PerformanceLearn More
Transmission Fluid Pressure LowLearn More
Intermittent Loss of CMP or CKPLearn More
Upstream Heated O2 Sensors SwappedLearn More
Ignition Retard Request Duration FaultLearn More
Downstream Heated O2 Sensors SwappedLearn More
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position PerformanceLearn More
MIL O/P Circuit MalfunctionLearn More
Leak Detection Pump Switch or Mechanical FaultLearn More
Target Idle Not ReachedLearn More
Line Pressure Solenoid SystemLearn More
Transmission System MIL FaultLearn More
Engine Coolant Temperature Circuit Low InputLearn More
No CCD Messages Received From PCMLearn More
TP (Mechanical) Circuit MalfunctionLearn More
Speed Fuel Pump Positive Feed FaultLearn More
1-2 Shift MalfunctionLearn More
Cooling System PerformanceLearn More
Incorrect Immobilizer KeyLearn More
Gear 1 Incorrect RatioLearn More
Mirror Passenger Drive Circuit FailureLearn More
Transmission Control System ElectricalLearn More
Camshaft Position Sensor Circuit IntermittentLearn More
Serial Communication Link MalfunctionLearn More
- Manufacturer: Jeep
About the Wrangler
The Jeep Wrangler is a series of off-road vehicles that have been manufactured by Jeep since 1986. There have been four generations since its initial debut. The fourth generation hit the markets in 2017.
It also shares many similarities to the Jeep Gladiator, which is a pickup truck version.
Thankfully, the Wrangler has not had to deal with too many serious issues. In fact, the most commonly reported fault code is not serious at all. Fault code P0456 is logged when a small leak has been detected from the EVAP system.
This is typically the result of a loose or defective gas cap. Owners have also reported that the battery can cause a leak in the nearby vacuum line.
Similarly, fault code P0455 is another common code that owners have had to face. This code indicates that there is a more significant leak in the EVAP system.
The presence of both of these codes likely means that the cause of the problem is not a loose gas cap. Checking the known leak point near the battery is a good start.
Another common issue for the Wrangler is P0128, which indicates that there is an issue with the thermostat. The code states that the coolant is not reaching the required temperature to activate the thermostat.
In most cases, this will be the result of a failed thermostat. It is also fairly common that this is caused by incorrect engine coolant fluid levels.