intermittent check engine light – P1443

'89cab · Dec 21, 2005

The check engine light comes and goes on my son’s ’96 GT. Originally, it was on all the time. OBD scanning indicated P1443 – Evaporative Emission Control. Starting with the cheapest stuff first, I’ve replaced the PCV valve, Purge Flow Sensor, and the gas cap. I also changed the Idle Air Control valve because of losing idle (had cleaned it a year ago).

Now the light is more on than off and I’m not sure how to check other sensors and hoses let alone what order to start looking. Any help? Thanks.

Mike

Jinx · Dec 21, 2005

Not sure about the '96, but my Mom has a '95. One of the more common things, other than the IAC valve, is the DHCP sensor (EGR valve position sensor) going bad.

Other things to consider:
EGR valve
EGR valve solenoid
Vac. leak

Good luck

Pearl02 · Dec 21, 2005

Jinx102672 said:
Not sure about the '96, but my Mom has a '95. One of the more common things, other than the IAC valve, is the DHCP sensor (EGR valve position sensor) going bad.

Other things to consider:
EGR valve
EGR valve solenoid
Vac. leak

Good luck

Yea, that's probably your problem. The sensor is called DPFE sensor. They get corroded inside. It will cost around $70.00. Pearl02.

blackfang · Dec 21, 2005

Have you checked the charcoal canister that is part of that evap system? That and the valve related to the charcoal canister. 90% of the evap codes we have pulled at work are either gas cap or the canister and or the valve.

intermittent check engine light – P1443

'89cab

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intermittent check engine light – P1443

'89cab

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I like cats, cats like me. Cats and I fully agree.

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