I just picked up a 2005 Saturn Ion 1. Just under 80,000 miles & clean title. The odometer and trip odometer are not working. Is this a part failure, or a PCM reset? Any thoughts?

oil should be changed every 5,000 miles

Odometer
The odometer is an electronic digital display. Digits displayed are illuminated by the odometer backlight bulb. The odometer backlight bulb brightness is controlled by class 2 messages from the BCM to adjust the display for daylight and instrument panel dimming operation. The trip odometer and total odometer will show in this display area. The push button in the lower right side of the speedometer is used to toggle between the trip and total odometer readings. To reset the trip odometer, push and hold the button down for at least two seconds. The total odometer display has six digits with no decimal display. The trip odometer has four digits including a decimal point and indicates tenths of a mile or kilometer.
The body control module (BCM) stores the vehicle mileage. If the BCM fails, the cluster will display the last valid mileage that was sent before the BCM failed. For replacement of the BCM refer to the BCM section of this service manual. Replacement instrument clusters do not require odometer pre-setting before installation. If the instrument cluster is replaced, the mileage stored in the BCM will be sent to the new cluster via serial data, and shown in the odometer display.

Your best bet , take it to a qualified repair shop.

I found this under Fixya; 2006 Subaru Outback; there were 25 answers: The problem is not with an emission issue as you would expect with a check engine light. The ER 55 code on the odometer means that there is a loss of communication with the ECU, that is why the check engine light is on and cruise light flashing. for what ever reason whenever your check engine light comes on the cruise becomes disabled. Lame I know. I work in the service department and have seen this issue a lot. The only real way to fix this issue is to go the dealer and have them do a reflash for your vehicle. If the ECU is bad it is covered under the federal emmission wrty for 8 years or 80,000 miles

hi there
the big fuse box is under the hood and the little fuse box is located under dash just to the left of the steering wheel have a wonderful day

Try this; get the car in an area that is as dark as possible, open the hood and let it idle. Allowing several minutes for your eyes to adjust to the dark, look for any sparks around the ignition wiring. My Saturn (now junked-too many problems) needed all plug wires replaced in under 3 years.

your computer needs to be reset. the mech who changed your oil should be able to help you out with that. If you did it your self just visit Saturn they can advise how to do this. It may also be in the owners manuale, though it usually is not.

if you are talking about the maintanence due, light it's quite simple; turn the key on' with the engine off. make sure that the odometer is in the odometer mode and not one of the trip settings. if it is in a trip setting reset to odometer mode. now turn the key off and push the the odometer reset button and hold it, turn on the key(don't release yet) and wait ill the odometer reads 000000. you are now done. if you are talking about the "check engine" or the "service engine soon"light, then your problems are a little more complicated then that and indicate that the computer has picked up a signal from one of the many sensors indicating a problem in one of the monitored systems. being as since this is a 2009 vehicle it should be under warranty regardless of weather you are the first owner or not as long as it's under 36,000 miles for non emission and 80,000 miles for emission related repairs

You could have a simple vacuum leak or a faulty computer.Listen to the engine with the hood up to see if you can hear a loud hissing sound that indicate a vac leak

remove electronic power steering (EPS) motor. remove the 4 bolts that hold on the motor housing. remove the housing. using a tooth brush, clean out the 'brush' dust from between the commutators. don't use cleaner spray as you might degrease the bearings. don't use anything metal to clean out the dust you might scratch or nick the commutators.

this solution has worked for over 500 miles for me. I'll keep you posted.

Problem is in the guage cluster assy.The ODO is mechanical,serviced by replacing guage cluster.