Question about 2001 Volkswagen Cabrio
I know the 1296 code is as you say, coolant temp sensor G92, but I dont feel that has any relation to the 0455 code, which refers to low evap system pressure. The fuel tank is pressurised to about 3 psi, due to its sealed construction for preventing petrol fumes reaching the outside. If the seals are not intact, the pressure will be zero, and the ecu will report code P0455. Your evap canister in the engine bay may be faulty, choked or has a tube off, or you really do have a fuel leak somewhere. The code refering to the temp sensor is seperate and you may have 2 unrelated faults. It isnt uncommon for a car to lose 2 sensors etc at the same time, or throw 2 unrelated codes. Treat each one as seperate until you know better and trace the source of each independantly.
Wont hurt the engine, its the emission control stuff that is complaining, but you can do no damage from the Evap code.
The engine temp sensor, will either make the temp gauge read wrong, which could be a problem if the motor overheats and the gauge does not indicate this - BAD - or - it will tell the ecu the car is colder than it is, and it will overfuel and idle faster than it should, not too much of a problem in itself.
I would still check out the fuel pipes etc to see if anything is leaking, as that can be very dangerous.
For peace of mind, is there anyone near you that can perform a pressure test on the gas tank?
Posted on Nov 06, 2009
Testimonial: "great feedback...Replaced the sensor,1296 went away, hasnt come back; havent done anything yet with 0455 as car running smoothly, will park 4 winter.."
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Posted on Jan 02, 2017
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