Standard Ignition Manifold Absolute Pressure Sensor P/N:AS304
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Keep fuel delivery and ignition timing dialed in with the Standard Ignition Manifold Absolute Pressure Sensor (AS304). This MAP sensor drops in as a direct-fit replacement for the listed applications, including the 2004-2005 Buick Century, 2004-2005 Buick Rendezvous, 2008-2009 Cadillac STS, 2008-2012 Chevrolet Chevy, and 2004-2005 Pontiac Grand Am — see the Buyer's Guide tab for the full list of 13 applications.
A manifold absolute pressure sensor reads the pressure inside the intake manifold and reports engine load to the engine control module, which uses that signal to help set fuel delivery and ignition timing.
Core job: Monitors intake manifold pressure and sends the corresponding signal to the ECM.
Supports normal running: Accurate manifold pressure data helps the ECM manage the correct air/fuel ratio and timing across engine load.
Signs this sensor may need replacing: Rough idle, hesitation, reduced fuel economy, or an illuminated check engine light — diagnose the cause first, and if a failed MAP sensor is confirmed, this replaces it.
This part cross-references / interchanges with the following part numbers:
EC1784, MAPA145, 2-20314, 12581167, 12615135
Frequently Asked Questions
What does this MAP sensor do?
It measures the pressure inside the intake manifold and reports engine load to the ECM, which uses that signal to help set fuel delivery and ignition timing.
Will this fit my vehicle?
It is a direct-fit replacement for the 13 listed applications, including the 2004-2005 Buick Century and 2008-2012 Chevrolet Chevy. Check the Buyer's Guide tab to confirm your exact vehicle.
What numbers does this part interchange with?
It cross-references EC1784, MAPA145, 2-20314 (220314), 12581167, and 12615135. Its own manufacturer part number is AS304.
What are the signs of a failing MAP sensor?
Rough idle, hesitation, reduced fuel economy, or a check engine light can occur. Diagnose the cause first, since these symptoms have other possible sources.
Does replacing this sensor fix a rough idle?
If a faulty MAP sensor is confirmed as the cause, replacing it with AS304 addresses that. Diagnose the underlying issue before ordering, as other components can cause the same symptoms.
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Standard Ignition Manifold Absolute Pressure Sensor P/N:AS304
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WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
