Gauges resetting with every start
10-17-2009, 08:48 PM
#1
1st Gear Member
Thread Starter
Join Date: Sep 2008
Location: Florida
Posts: 128
Gauges resetting with every start
For some reason for about a week now my gauges have been resetting (going to max then returning to zero before working) every time the car starts. What could be the reason for that?
I feel like it might be a sign that my battery is getting ready to give out on me.
I feel like it might be a sign that my battery is getting ready to give out on me.
10-17-2009, 09:43 PM
#5
4th Gear Member
Join Date: May 2008
Location: Santa Monica, CA
Posts: 1,842
That happens to my car everytime I reconnect the battery after having it disconnected when I go on vacation or when I am doing something and disconnect the battery for a few minutes
Does it for a few starts and then goes back to normal
Does it for a few starts and then goes back to normal
10-18-2009, 12:08 AM
#8
4th Gear Member
Join Date: Jul 2006
Location:
Posts: 1,495
autozone sells used batteries for like $15 bucks i believe. or at least they used to
10-18-2009, 07:00 AM
#9
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
Check fuse #21 (5A) under the dash. It powers the instrument cluster and the PCM's memory, the car will start and run fine if it's blown however the cluster will reset each time you start as you describe.
It's being blown will also reset the KAM (Keep Alive Memory) each time you shut the car off for more than 5 minutes. This leaves the PCM pretty much in a permanent learning mode (idle air, fuel trims, etc.) each time you drive it. This mostly affects precise tuning of AFR and fuel economy--you'd also fail emissions testing in those states that look for the OBD2 "system ready/tests complete" flag.
It's being blown will also reset the KAM (Keep Alive Memory) each time you shut the car off for more than 5 minutes. This leaves the PCM pretty much in a permanent learning mode (idle air, fuel trims, etc.) each time you drive it. This mostly affects precise tuning of AFR and fuel economy--you'd also fail emissions testing in those states that look for the OBD2 "system ready/tests complete" flag.
10-18-2009, 11:44 AM
#10
5th Gear Member
Join Date: Nov 2006
Location: MA
Posts: 2,402
Check fuse #21 (5A) under the dash. It powers the instrument cluster and the PCM's memory, the car will start and run fine if it's blown however the cluster will reset each time you start as you describe.
It's being blown will also reset the KAM (Keep Alive Memory) each time you shut the car off for more than 5 minutes. This leaves the PCM pretty much in a permanent learning mode (idle air, fuel trims, etc.) each time you drive it. This mostly affects precise tuning of AFR and fuel economy--you'd also fail emissions testing in those states that look for the OBD2 "system ready/tests complete" flag.
It's being blown will also reset the KAM (Keep Alive Memory) each time you shut the car off for more than 5 minutes. This leaves the PCM pretty much in a permanent learning mode (idle air, fuel trims, etc.) each time you drive it. This mostly affects precise tuning of AFR and fuel economy--you'd also fail emissions testing in those states that look for the OBD2 "system ready/tests complete" flag.