2002 Pontiac Grand Prix GTP 3.8L MIL Lamp on
Double check egr tubes both clean into intake manifold, removed throttle plate to check orfice and was clear. Engine stumbles when egr is activated and map volts increase. Tried new egr delco and new map sensor delco / still throws code po401. Pcm calibration ...
Summary posted 3/2/2011
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Vehicle Data2002 Pontiac Grand Prix GTP
Trouble Codes
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Vehicle Data
2002 Pontiac Grand Prix GTP
VIN | 1G2WR52102 |
Engine | 3.8 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection / sefi |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always, When Runs Monitor |
Misc. | Gtp/ Supercharged |
Trouble Codes
P0401 | EGR System Insufficient Flow Detected |