P1128 is a manufacturer-specific troubled code. In the case of the Jeep Cherokee, it indicates that the engine did not enter “closed-loop” fueling on the bank 1 side. If any other codes appear with P1128, start with them since this code does NOT indicate what has caused the engine not to go into closed-loop operation. … Read more
P0523 is a standard OBD2 trouble code that can occur in the Jeep Cherokee. In layman’s terms, it indicates the signal from the oil pressure sensor is higher than its normal operating range (in terms of voltage). P0523 is generic (it has the same definition for all vehicles), repair steps will depend on your Cherokee’s … Read more
P0705 is a very common transmission-related trouble code that can occur in the Jeep Cherokee. In layman’s terms, it means that your Cherokee can’t tell what gear you’ve selected, which can have some real consequences on how it drives. It’s most likely caused by a bad Transmission Range Sensor (TRS), but there are other causes … Read more
Chrysler-made vehicles, such as the Jeep Cherokee, commonly use an oil pump with a high-pressure mode and a low-pressure mode. P06DD is stored in the PCM’s (powertrain control module) memory when the engine is stuck in low-pressure mode. P06DD is a very common code to find in the Cherokee. P06DD can be caused by a … Read more
Daytime running lights (or DRL) are specialized lights that come on when your Jeep Cherokee’s regular headlights are turned off. Their purpose is to make it easier for other drivers to see you, theoretically decreasing the odds of getting into an accident. If your Cherokee’s DRL warning light is on, the powertrain control module (commonly … Read more
P2271 is a generic DTC trouble code that can affect the Jeep Cherokee. It indicates that the oxygen sensor located on bank 1 in the second position is continuously sending voltage with a value that is too rich. There are oxygen sensors on both sides of the catalytic converter. The “upstream” one is used for … Read more
P2279 is a generic OBD-II code. It indicates there is a vacuum leak coming from your Jeep Cherokee’s air intake system. While P2279 is a generic code (it has the same definition for the Cherokee as it would any other vehicle made after 1996), repair steps will vary based on model year and engine. The … Read more
P0605 is a relatively rare OBD-II trouble code that can occur in the Jeep Cherokee. It indicates that PCM (powertrain control module) is not passing its ROM (read-only memory) self-test when you turn the ignition on. While P0605 is a generic code (it has the same meaning for any car or truck), it is most … Read more
P0116 indicates that your Jeep Cherokee’s engine coolant temperature sensor is sending a signal to the PCM (powertrain control module) that is outside of its normal operating range (in terms of voltage). While P0116 is a generic OBD2 code (it has the same definition for any car or truck), it has the same basic causes … Read more
P0117 is a generic OBD2 code. It indicates that your Jeep Cherokee’s PCM (powertrain control module) has detected the signal coming from the engine coolant temp (ECT) sensor has a voltage level below its normal operating range. With the ECT sensor, as the voltage level drops, it will appear that your Cherokee is overheating. While … Read more