2001 1.9T - P0444 - Low Idle, goes away temporarily when is Code Reset
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2001 1.9T - P0444 - Low Idle, goes away temporarily when is Code Reset
Hi All,
I started to get this code "P0444 -- ECM-421C -- Evaporative emission system (EVAP) valve -- Signal too high" the other week. A few days after, the car started idling low (~650rpm) and would shudder or stall when revved (does not go back to idle without some hesitation). If I reset the code, everything is OK for a while (a few days). Even stranger: the code comes back almost immediately, but at first the engine behaves normally; however a few days later the low idle comes back. Any ideas?
Thanks All
I started to get this code "P0444 -- ECM-421C -- Evaporative emission system (EVAP) valve -- Signal too high" the other week. A few days after, the car started idling low (~650rpm) and would shudder or stall when revved (does not go back to idle without some hesitation). If I reset the code, everything is OK for a while (a few days). Even stranger: the code comes back almost immediately, but at first the engine behaves normally; however a few days later the low idle comes back. Any ideas?
Thanks All
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Thanks Hudini. Will get it checked out. Just curious (for my own knowledge), how it is linked to the reset of the codes? Howcome it will self-correct then eventually get bad again? Does the ECU adjust the idle after some time with the code on? Thanks 
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Galaxy850Sunny
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Feb 15, 2015 08:15 AM
