ses light came on today with code ipm bo429 showing current. then the light turned off the next time i started the car. whats that code mean? and should i worry about 4 codes i have showing as history?
B0429 - Temperature Control #3 Rear Circuit Range/Performance
This code will not trip the SES light. It just means that the rear temperature air mix door is not in the commanded position. It is a rather common code and it doesn't take much to set it. One of the history codes most likely set the SES light. Probably a "P" (PCM) code.
I have a 91 deville with a 4.9l. I have done a lot of diagnostic for a apparent miss. I had a tune up which was supposed to be new plugs, wires, fuel filter, cap, and button. That was a year ago.
Still, the miss continued. I speculated on this board about it possibly being the fuel pump. I...
While driving in my 97' Sedan DeVille with the A/C on,
I get occasionally a "Low Oil / High Engine Temp" message on my display.
Checked oil, reading was perfect.
Only happens when I put on A/C after about 35 minutes.
Car currently has 104k miles.