99 Pontiac Grand Prix 3.8 V6 171,000 miles:Error code 118- Coolant temperature switch. I bought one at parts store,how and where on the vehicle do I replace it? I'm hoping it might be cheap fix to the intermittent starting problems I'm having
I also added some EFI cleaner to gas tank
I also bought a fuel filter that I'm told should be replaced on fuel line somewhere near rear of vehicle but not in fuel pump/gas tank
Any comments on any or all of these three possible solutions to error code 118 as mentioned above
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As you see I provided you the models you can apply the transmission :The 4T65E-HD (code MN7) is a heavy duty version of the 4T65-E used with more powerful engines such as the LS4 V8 and L67/L32 supercharged V6.
Pontiac Bonneville SSEi L67
Chevrolet Impala L67
Chevrolet Monte Carlo L67
Pontiac Grand Prix GTP/GXP
Buick Regal GS
Buick Riviera L67 (97-99)
So ,yes you can!
If the temperature gauge looks good (under 3/4) its all good. If not, then there is a problem. If it smells hot inside, like moist and humid you will need to replace the ac filter, that can be located under the hood, close to the water resevoir, you will have to pull the ruber type gasket that is on the edge of the hood/wiper cover.
I suspect you have a bad fan relay or temperature sensor. Here's a link to a page where you can see what these parts look like. The fan relay is usually located in the engine compartment inside a plastic box with a removable lid. It just plugs in and out. The temperature sensor will screw into your engine block and have a cable connected to it. Your owner's manual may give you their exact locations.
If the seat belt light comes on intermittently with the belt buckled, it may have a bad switch in the buckle or a loose connection @ the switch. This may also set a diagnostic trouble code in the srs control module & keep the srs airbag light on.