Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2009LIBERTY LIMITED, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDTCS P1897 TO P2174 (GAS)
2009 Jeep Liberty Limited, RWD
DTCS P1897 To P2174 (Gas)
2009 Jeep Liberty Limited, RWDSECTION DTCS P1897 To P2174 (Gas)
- P1897-Level 1 Rpm Bus Unlock
- P2072-Electronic Throttle Control System - Ice Blockage
- P2096-Downstream Fuel Trim System 1 Lean
- P2097-Downstream Fuel Trim System 1 Rich
- P2098-Downstream Fuel Trim System 2 Lean
- P2099-Downstream Fuel Trim System 2 Rich
- P2100-Electronic Throttle Control Motor Circuit
- P2101-Electronic Throttle Control Motor Performance
- P2107-Electronic Throttle Control Module Processor
- P2110-Electronic Throttle Control - Forced Limited Rpm
- P2111-Electronic Throttle Control - Unable To Close
- P2112-Electronic Throttle Control - Unable To Open
- P2115-Accelerator Pedal Position Sensor 1 Minimum Stop Performance
- P2116-Accelerator Pedal Position Sensor 2 Minimum Stop Performance
- P2118-Electronic Throttle Control Motor Circuit
- P2122-Accelerator Pedal Position Sensor 1 Circuit Low
- P2123-Accelerator Pedal Position Sensor 1 Circuit High
- P2127-Accelerator Pedal Position Sensor 2 Circuit Low
- P2128-Accelerator Pedal Position Sensor 2 Circuit High
- P2135-Throttle Position Sensor 1/2 Correlation
- P2138-Accelerator Pedal Position Sensor 1/2 Correlation
- P2166-Accelerator Pedal Position Sensor 1 Maximum Stop Performance
- P2167-Accelerator Pedal Position Sensor 2 Maximum Stop Performance
- P2172-High Airflow/Vacuum Leak Detected (Instantaneous Accumulation)
- P2173-High Airflow/Vacuum Leak Detected (Slow Accumulation)
- P2174-Low Airflow/Restriction Detected (Instantaneous Accumulation)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.