See a few examples:thermostatin a Ford 2.3L EcoBoost engine. Thisphotoshows the thermostat housing in the Mazda 2.3L turbo DISI engine. This is aphotoof a thermostat housing in the Dodge Charger SRT Hemi engine. Symptoms of a bad thermostat Symptoms of a bad thermostat can be divided into...
Of course, a whole host of issues can set off the Check Engine Light, so you should have the computer scanned for trouble codes to narrow down the culprit, even in the case that the Check Engine light is illuminated together with other bad idle air control valve symptoms above. Bad Idle ...
as well as surging on light acceleration. In a diesel engine, a bad EGR valve is one of the causes of a black smoke. The Check Engine light might also come on in either case.
The service bulletin for Nissan Maxima dated March 2004 mentions replacing an air/fuel sensor as a solution for the code P0171. Another Ford TSB for a number of late 90-s Ford vehicles describes a problem with MAF sensor contamination where both codes, P0171 and P0174 would appear together....