2007 grand prix 3800 supercharged issue:

mjs

Jr. Member
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#1
Make
Pontiac
Model
Grand Prix
Year
2007
Miles
138000
Engine
3800 v-6
Rough idle,Poor gas mileage, small amount of antifreeze lose over a couple weeks, and uses oil. changed plugs and wires also vacuum hoses,but cant find anything wrong. code does come up C0700. Any ideas would be appreciated.
 

kev2

wrench
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Nov 14, 2006
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#2
the C0700 is not related to engine* issue, this is a chassis code.

Ideally we want to see live data, the information as seen by the PCM - I look at ECT, MAP, TPS, MAF, fuel trims and o2 sensor voltages.

There are no other codes? the new plugs were AC Delco.. how did the old plugs look, wet dry black white, looked steam clean?



* the C0700 does this vehicle have air suspension?
 

nickb2

Wrench. Diagnostic Tech.
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Nov 22, 2008
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#4
There is absolutely no C0700 code for this car.

That was either a typo or the thing used to get codes is not good. This code does not exist.

Loosing coolant or burning coolant? Loosing oil, or burning oil?