What does general motors trouble code 26 mean?
I own a shop, and from what I can tell; I would say you have a bad (Electronic Control Module) ECM. If you are getting this code on an Oldsmobile or Buick, then this is what the problem is. Looking at the code book, it gives this code in many places, but these are GM codes in which cover many different vehicles, and the first code there is for Quad Driver Circuit, and probably doesn’t apply to yours. What does jump out at me is the ECM failure on your vehicle type. The others will be as follows: (1) Transaxel gear switch circuit, (2) EVAP purge solenoid circuit (vin P 5.7 liter engine), (3) TPS circuit shorted, and (3) Idle speed control (ISC) motor/throttle switch circuit shorted. If I were to bet on this one, I would bet you have a bad computer. To be fully certain, you must eliminate the others, or have the dealer run the diagnostics on it for you for a fee. You must use the symptoms the engine is doing, and incorporate that into all the different codes you get from the computer, an
