What causes Service 4 wheel drive light?
The “Service 4WD System” message indicates a problem with the 4WD system that should be properly diagnosed and repaired. When the ignition key is turned from OFF-RUN-START and is released back to the RUN position after the vehicle starts, the 4WD warning light should go on for 1 to 2 seconds and then go out.
How do you reset the computer on a Jeep Grand Cherokee?
Jeep ECU Reset Procedure
- Disconnect the battery by removing the positive battery cable.
- Ground the positive cable to the negative cable for 30 seconds to erase the electric charge in the capacitors.
- Reconnect the positive cable to the battery.
- Turn the key to on but do not start.
- Turn the headlights on.
Is there a problem with Jeep Grand Cherokee 4 wheel drive?
No 4 wheel lo after n23 flash. No steady message either. After p73 flash problem fixed for about a week. Now Service 4wd message on 95% of the time as well as check engine light. No 4 wheel drive lo working Recall issued to hopefully resolve problem.
Why is my 4WD not working on my Jeep Wrangler?
They could be any of the following but not limited to: These are some of the most common reasons why your Jeep could fail to engage the 4WD system. The symptoms will differ somewhat between them, for example, the 4WD light will flash on the dash but never actually engage, or the 4WD light will shine solid, but you have no active 4WD engaged.
What does the blinking 4 wheel drive indicator mean?
So what is that 4 wheel drive indicator blinking on your dashboard means? The purpose of the 4 wheel drive light is to indicate when you have engaged 4WD mode by selecting 4H. When the light flashes continuously for more than 30 seconds it signifies there is a problem somewhere on your drivetrain system and that 4WD has not engaged properly.
What does the 4WD warning light on my Jeep Compass mean?
The light means there is a malfunction in the 4wd system. Could be a glitch in the computer or an actual problem. Don’t think it effects the inspection sticker. Might wanna have a dealership look at it to be sure. The owners manual explains all the dash board lights.