Ram 1500/2500/3500: 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 driveability.
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.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system
determines
that the fuel filler cap is loose, improperly
installed, or damaged, a loose gascap indicator
will display in the EVIC telltale display area.
Refer to "Electronic Vehicle Information Center (EVIC) in "Understanding Your Instrument Panel" for further information.
Tighten the fuel filler cap properly and press the SELECT button to turn off the message. If the problem continues, the message will appear the next time the vehicle is started.
A loose, improperly installed, or damaged fuel filler cap may also turn on the Malfunction Indicator Light (MIL).
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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
Ins
Replacement Parts
Use of genuine MOPAR parts for normal/scheduled
maintenance and repairs is highly recommended to ensure
the designed performance. Damage or failures
caused by the use of non-MOPAR parts for maintenanc
Maintenance Procedures
The pages that follow contain the required maintenance
services determined by the engineers who designed your
vehicle.
Besides those maintenance items specified in the fixed
"Maintenance Schedule", t
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Description
The air suspension system is a rear leveling ride height
system. The main purpose of this system is to maintain
the truck's rear ride height level.
Rear Leveling Ride Height Switch
Normal Ride Height (NRH) - This is the standard
position of the suspension and is meant for normal
driving.
Trailer Mo
Driving Through Water
Driving through water more than a few inches/centimeters deep will require extra caution to ensure
safety and prevent damage to your vehicle.
Flowing/Rising Water
WARNING!
Do not drive on or across a road or path where water
is flowing and/or rising (as in storm run-off). Flowing
water can wear away
