Understanding your Jeep Cherokee’s On-Board Diagnostics (OBD2) codes is crucial for diagnosing and resolving vehicle issues. This guide provides a comprehensive list of OBD2 codes for various Jeep Cherokee models, empowering you to troubleshoot problems effectively. Reading and understanding these codes can save you time and money on repairs.
Understanding Jeep Cherokee OBD2 Codes
OBD2 codes are standardized across most vehicles manufactured after 1996. These codes consist of a letter and four numbers, each representing a specific system or component malfunction. For pre-1996 models, Jeep Cherokees utilized manufacturer-specific codes.
Pre-1996 Jeep Cherokee OBD2 Codes:
Carbureted Engines:
- Code 12: No distributor reference pulses to the ECM.
- Code 13: Oxygen sensor circuit issue.
- Code 14: Shorted coolant sensor circuit.
- Code 15: Open coolant sensor circuit.
- Code 21: Throttle position sensor circuit issue.
- Code 23: Mixture control solenoid circuit short or open.
- Code 34: Vacuum sensor circuit issue.
- Code 41: No distributor reference pulses at specific vacuum.
- Code 42: Electronic Spark Timing (EST) circuit issue.
- Code 44: Lean exhaust indication.
- Code 45: Rich exhaust indication. Codes 44 and 45 together often indicate an oxygen sensor problem.
- Code 51: Faulty calibration unit (PROM) or installation.
- Code 54: Mixture Control (MC) solenoid circuit short or faulty ECM.
- Code 55: Voltage reference short to ground, faulty oxygen sensor, or faulty ECM.
Fuel Injected Engines (Except 1991 and Later):
This section lists numerous codes ranging from issues with ignition lines (Code 1000/1001), sensor ground lines (Code 1005), MAP lines (Code 1012/1013), to more complex issues like ECU defects (Code 1200) and injector problems (Code 1202/1209).
1991-1995 Models:
These models use a different set of codes. Code 11 indicates a camshaft or ignition signal problem, Code 13 relates to the MAP sensor, and Code 21 signifies an oxygen sensor issue. Other codes cover areas like coolant temperature (Code 17), throttle position (Code 24), and various system failures (e.g., Code 31 for purge solenoid circuit).
1996 and Later Jeep Cherokee OBD2 Codes:
These models utilize standardized OBD2 codes. Some common codes include:
- P0135: O2 sensor heater circuit malfunction (Bank 1, Sensor 1).
- P0300: Random/multiple cylinder misfire detected.
- P0420: Catalyst system efficiency below threshold (Bank 1).
- P0700: Transmission Control System (TCS) malfunction.
This section includes a long list of P-codes covering various systems, from engine misfires (P0301-P0308) to issues with the evaporative emission system (P0441-P0455) and transmission problems (P0711-P0783).
Using an OBD2 Scanner
To retrieve OBD2 codes from your Jeep Cherokee, you’ll need an OBD2 scanner. These devices connect to the OBD2 port, usually located under the dashboard on the driver’s side. After connecting, the scanner can read and display the stored trouble codes.
Conclusion
This guide provides a detailed overview of Jeep Cherokee Obd2 Codes. While this information is helpful for initial diagnosis, consult a qualified mechanic or refer to a Jeep Cherokee-specific repair manual for accurate diagnosis and repair. Remember, safety is paramount when working on your vehicle.
