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Tom, ASE Certified Technician
Category: Car
Satisfied Customers: 25920
Experience:  ASE Certified Master Technician
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2003 isuzu: trans light comes..power, down shifts..truck it resets

Resolved Question:

2003 isuzu npr trans light comes on..loss of power, down shifts by its self...stop the truck it resets, then will happen again later on
Submitted: 4 years ago.
Category: Car
Expert:  Tom replied 4 years ago.
Is the engine light on?
Customer: replied 4 years ago.

no engine light comes on...& sorry the trans does not drop down a shift...that was another truck.just when the trans light comes on at times it looses some power,,

Expert:  Tom replied 4 years ago.
Ok did you get the code stored for the transmission light?
Customer: replied 4 years ago.
i will get one it soon hang on
Expert:  Tom replied 4 years ago.
Ok just post it here once you have it this way we can properly diagnose the issue.
Customer: replied 4 years ago.
code says vss1 circuit
Expert:  Tom replied 4 years ago.
OK thats telling you the VSS(vehicle speed sensor)is bad and causing this issue.You will need to replace the VSS to fix this issue .This is the next step.Hoped this helped.Positive feedback and bonuses greatly appreciated.
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