'98 V70 GLT "check engine" light - do not believe it is the gas cap

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daffy Contact options for registered users 's Avatar posted on
July 9, 2011, 1:45 pm
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I know about the potential problem with a gas cap not on tightly
enough.  I have been over that bridge already.  I always make sure it
clicks audibly when refueling.  I have also in the past, when this
light first started being a problem, had the light reset by a mechanic
just in case it was the gas cap/refueling issue.  The light came back
on.

I am worried about this because I will have to have the car
inspected.  It will be a problem, will it not, if the "check engine"
light is on with regard to passing inspection?

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clare Contact options for registered users 's Avatar posted on
July 9, 2011, 3:58 pm
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Re: '98 V70 GLT "check engine" light - do not believe it is the gas cap

wrote:


 That depends where you are.

Exactly what code are you getting? If it is an evaporative system code
you could have a bad solenoid valve in the system, which can be
checked by the dealer - a bad vent line, a corroded fuel filler line,
a bad fuel cap, or a rusted filler where the cap needs to seal (and
cannot).

In regards to the solenoid valves - it can be an electrical failure, a
mechanical failure, a wiring problem, or even a control problem (the
"driver" in the computer blown, for example".

BASICALLY - a 440, 442,455 or 456 code indicates a system leak
somewhere, while a 446 indicares a vent solenoid/system problem, a 443
is a purge valve/system problem, and a 453 is  a high pressure problem
- which can be a sensor, vent, or purge problem and often occurs with
either a 443 or 446.

The 445 is the most common "loose cap" code.

 

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