Onboard Diagnostic System - Obd Ii; Loose Fuel Filler Cap Message; Emissions Inspection And Maintenance Programs - Chrysler PT Cruiser Owner's Manual

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 emis-
sions well within current government regulations.
If any of these systems require service, the OBD II
system will turn on the Malfunction Indicator
Light (MIL). OBD II will also store diagnostic
codes and other information to assist an authorized
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.

Loose Fuel Filler Cap Message

After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is loose, improperly
MAINTAINING YOUR VEHICLE 311
installed, or damaged. A "gASCAP" message will be
displayed in the instrument cluster. Tighten the gas cap
until a clicking sound is heard. This is an indication that
the gas cap is properly tightened. Press the odometer
reset button to turn the message off. If the problem
persists, the message will appear the next time the
vehicle is started. This might indicate a damaged cap. If
the problem is detected twice in a row, the system will
turn on the MIL. Resolving the problem will turn the MIL
light off.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass
an inspection of your vehicle's emissions control system.
Failure to pass could prevent vehicle registration.
For states that require an Inspection and Mainte-
nance (I/M), this check verifies the Malfunction
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