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ERROR CODE P2074

 
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Old 08 Jun 2009, 05:15 pm
spinner's Avatar
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Default ERROR CODE P2074

My wife was coming home and the check engine light came on so she stopped by NAPA and had it checked and it came up with p2074? any ideas? they told her it may be a dirty air cleaner, which I doubt, I put a new CAI on it 4 months ago and this is the first code it has thrown? so any help would be great!!!
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Old 09 Jun 2009, 07:36 pm
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Default Re: ERROR CODE P2074

BUMPING DOES NO GOOD WHEN YOU HAVE THE ONLY POST. When there's a few posts after yours of a different subject then bumping brings it to the top of the list of threads. When there's no other posts, all bumping does is add to your own post. It's still flagged as a new post to everyone that comes to the forum without the bumping.


P2074-Manifold Pressure/Throttle Position Correlation - High Flow/Vacuum Leak

Possible causes:

Vacuum Leak
High Resistance in Map (K7) 5 Volt Supply Circuit
Resistance to Ground In Map (K7) 5 Volt Supply Circuit
MAP Sensor
High Resistance in (K1) Map Signal Circuit
Resistance to Ground in (K1) Map Signal Circuit
High Resistance in (K4) Map Ground Circuit
TP Sensor Operation
High Resistance in (K7) TP Sensor 5 Volt Supply Circuit
Resistance to Ground In (K7) TP Sensor 5 Volt Supply Circuit
TP Sensor
High Resistance in (K22) TP Signal Circuit
Resistance to Ground in (K22) TP Sensor Signal Circuit
High Resistance in TP (K4) Sensor Ground Circuit
PCM

As you can see there are a number of possible issues which can cause this DTC. You may be able to visually check a few things (vacuum) on your own however the majority of tests require the use of a DRB III scan tool, diagnostic manual and other test equipment. Based upon your description I would lean towards a vacuum related issue.

1. Inspect the Intake Manifold for leaks and cracks.
2. Inspect the Power Brake Booster for any vacuum leaks.
3. Inspect the PCV system for proper operation or any vacuum leaks.
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Last edited by CREWZIN; 09 Jun 2009 at 07:40 pm.
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Old 10 Jun 2009, 06:44 am
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Default Re: ERROR CODE P2074

Thanks for the info, I will start checking the lines and intake this weekend! hopefully it will be something simple!!!
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