P0406 is a generic OBDII Diagnostic code. It deals with the signal coming from the EGR system. In this case, it means that the signal coming from the EGR system is higher than the specified range Since it is a generic code, it has the same meaning for the Jeep Grand Cherokee as it … Read more
One of the most common (and inconvenient) problems with the Jeep Grand Cherokee is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is … Read more
P0405 is a generic OBDII trouble code. It deals with the signal coming from the EGR system. Since it is a generic code, it has the same meaning for the Jeep Grand Cherokee as it would any other vehicle. The EGR system allows a certain amount of the Grand Cherokee’s exhaust to re-enter the … Read more
P0431 is a standard OBDII trouble code, which means that it has the same meaning for the Jeep Grand Cherokee as it would any other vehicle. It is closely related to P0430 (which is one of the most popular OBDII codes). Warm Up Catalyst Efficiency → Below Threshold (Bank 2) When it’s the only trouble … Read more
P0421 is a relatively rare OBDII trouble code. It’s generic, which means it has the same definition for the Jeep Grand Cherokee as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Jeep Grand Cherokee’s catalytic converter is not scrubbing … Read more
P0411 is a general OBDII trouble code, which means that it has the same meaning for the Jeep Grand Cherokee as it would any other car or truck. By definition, the code is letting you know that the ECM has detected incorrect flow in the secondary air injection system. P0411: Secondary Air Injection System → … Read more
A relatively common, yet difficult to diagnose OBD-II trouble code is P0316. It has the same meaning for the Jeep Grand Cherokee as it would any other vehicle. It indicates that there is a misfire at the startup of the vehicle, and that it happens within the first 1000 revolutions of the engine. P0316: Engine … Read more
P0740 is one of the most common transmission trouble codes. It means that the Grand Cherokee‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit. P0740: Torque Converter Clutch Circuit Malfunction The TCC “locks” the drivetrain, which allows for a true mechanical connection between the … Read more
P0160 is a standard OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Jeep Grand Cherokee. When a vehicle has P0160, the PCM/ECM is not detecting any activity from the sensor. It doesn’t mean that the O2 sensor isn’t getting power, but that the voltage isn’t changing, which … Read more
P0118 is a common OBDII trouble code. It is a general code, which means that it’s going to have the same meaning for the Jeep Grand Cherokee as it would any other vehicle. P0118: Engine Coolant Temp Sensor Circuit → High Input This code is thrown when the resistance coming from the coolant temp … Read more