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!!!
Re: ERROR CODE P2074
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P2074-Manifold Pressure/Throttle Position Correlation - High Flow/Vacuum Leak
High Resistance in Map (K7) 5 Volt Supply Circuit
Resistance to Ground In Map (K7) 5 Volt Supply Circuit
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
High Resistance in (K22) TP Signal Circuit
Resistance to Ground in (K22) TP Sensor Signal Circuit
High Resistance in TP (K4) Sensor Ground Circuit
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 08:40 pm.
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