Q: I change MAF & 02 sensors n now my truck won't even start

The first thing you want to do is have a certified mechanic unplug the main computer and test the wires coming out of it. Either the wiring is bad, or the computer's connectors have a little condensation and corrosion, which...

GM has been trying to use cylinder deactivation in Cadillacs for years now. In my opinion they are not very good. GM's are notorious for having horrible electrical problems and now they are making engines with electronic mechanical cylinder deactivation....

For this code, there is a related technical service bulletin (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-by-parker-hill) 06-06-04-003D (http://workshop-manuals.com/buick/terraza_awd/v6-3.5l_vin_l/powertrain_management/prom_programmable_read_only_memory/component_information/technical_service_bulletins/customer_interest/06-06-04-003d/) dated March 20,2007. The TSB calls for installing a new EGR kit consisting of a new valve, tube, and wire connector, and directions to reprogram the powertrain...

when your check engine light comes on, it is because your car's controller has detected a malfunction and stored a corresponding trouble code. The technician can read the codes with a scan tool, and take the appropriate action. He then...

Hi there. The fuel is warm when the level is low and when the fuel tank is filled up the fuel tends to get cooler than it was before. In general, the fuel is low dense when it is warm...

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) is a small valve on the engine's intake system...

The P0104 is probably the key. This is a code for the Mass Air Flow circuit. What it means is that the reading from the MAF is not along the lines of what the ECU expects. The 171 and 174...

Hello. If the horn is working normally then you have a programming issue. In most cases the control module for the alarm will need to be reprogrammed by the dealer in order to make it operational again. If the horn...

Hi Francine. Thanks for contacting us today. Leaks like you are describing are commonly caused by damaged body or window seals. There really isn't a process I can recommend for trying to locate the source of the leak, as it's...