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1997 Geo Prizm LSi 1.8L MIL Lamp on
Posted to GM Driveability on 8/19/2004 3 Replies

found code 1780 comes back every time vehicle is placed from park to any gear and back. new switch has same thing. found 12 volts on pcm connector pins for reverse, low, and 2nd gear, but not for park or [...] new wire from switch to pcm, has same problem, tri...

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  Related Documents & Media  1997 Geo Prizm LSi

 
Message Closed w/Summary

car Vehicle Data

1997 Geo Prizm LSi

VIN 1Y1SK5283V
Engine1.8 L / 4 cyl / GAS
Trans3-speed Automatic
DeliveryFI / MFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.4 Door

Trouble Codes

P1780Shift Control System Malfunction
Message Closed w/Summary

car Vehicle Data

1997 Geo Prizm LSi

VIN 1Y1SK5283V
Engine1.8 L / 4 cyl / GAS
Trans3-speed Automatic
DeliveryFI / MFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.4 Door

Trouble Codes

P1780Shift Control System Malfunction