rlane547

Thanks guys. I knew what you meant. I can clear the codes with our shop scanner. I will be checking the alternator output, cleaning grounds, load testing batteries, etc. this evening. Read quite a bit about the electrical noise issues and I am going to try the foil and ground to see if that helps.Thanks for help. Anything else is greatly appreciated.

Thank you very much.

I have a new to me 99 2500. I took it on an eight hour round trip drive and on the way back check engine light came on. I didn't notice any drivability issues at all and light went out after 40 miles. When I got home I pulled the codes and found po122 apps voltage low and po237 map sensor voltage low. Do you guys think it could just be a one time glitch or should I investigate asap? Thanks.