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:

Special Additives
The manufacturer strongly recommends against the addition of any additives to the transmission. The only exception to this policy is the use of special dyes to aid in detecting fluid leaks. The ...

Rear loadspace
Never allow passengers to travel in the loadspace under any circumstances. All vehicle occupants should be seated correctly and wear a seat belt at all times when the vehicle is in motion. Al ...

Checking the clutch function
Check the clutch engagement and disengagement. 1. With the engine idling, check that there are no abnormal noises when the clutch pedal is depressed, and that shifting into 1st or reverse feels ...