Jeep Liberty: Onboard Diagnostic System — OBD II - Maintaining Your Vehicle - Jeep Liberty Owner's ManualJeep Liberty: Onboard Diagnostic System — OBD II

Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. When these systems are operating properly, your vehicle will provide excellent performance and fuel economy, as well as engine emissions well within current government regulations.

If any of these systems require service, the OBD II system will turn on the “Malfunction Indicator Light (MIL).” It will also store diagnostic codes and other information to assist your service technician in making repairs. Although your vehicle will usually be drivable and not need towing, see your authorized dealer for service as soon as possible.

CAUTION!
• Prolonged driving with the MIL on could cause further damage to the emission control system. It could also affect fuel economy and drivability. The vehicle must be serviced before any emissions tests can be performed.

• If the MIL is flashing while the engine is running, severe catalytic converter damage and power loss will soon occur. Immediate service is required.

Engine Compartment — 3.7L
1 — Air Cleaner Filter 2 — Engine Oil Dipstick 3 — Brake Fluid Reservoir 4 — Integrated Power Module (Fuses) 5 — Battery 6 — Washer Fluid Reservoir 7 — Engine Coolant Reser ...

Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel filler cap is loose, improperly installed, or damaged, a “gASCAP” message will display in the odometer or a “CHECK gASCAP” messa ...

See also:

Manual transaxle
Manual transaxle operation The manual transaxle has five forward gears. Press the clutch pedal down fully while shifting, then release it slowly. A special safety feature prevents inadvertent sh ...

USB Flash Memory Device Error Messages
If you see an error message on the audio display while playing a USB flash memory device, find the solution in the chart to the right. If you cannot clear the error message, take your vehicl ...

Tire pressure monitor system (TPMS)
The Tire Pressure Monitor System (TPMS) will warn the driver of a low tire pressure based on the vehicle recommended cold placard pressure. The tire pressure will vary with temperature by about ...