Standard Ignition Manifold Absolute Pressure Sensor P/N:AS637
Keep your engine's fuel and spark calculations reading true with the Standard Ignition Manifold Absolute Pressure Sensor AS668. It installs as a direct-fit replacement for the 2016-2019 Cadillac CT6 equipped with the V6-3.0L engine, restoring the manifold-pressure signal the powertrain control module relies on to meter fuel and adjust timing.
A manifold absolute pressure (MAP) sensor measures the pressure of the metered air inside the intake manifold and converts it into a signal the ECM uses to calculate engine load. When the original sensor drifts or fails, that signal becomes unreliable and the engine can run rich or lean.
Signs the sensor may need replacing include rough idle, hesitation, reduced fuel economy, or a stored check-engine code. If a faulty MAP sensor is the cause, this AS668 replaces it; diagnose the underlying cause before installing.
Manufacturer part number AS668.
What does this MAP sensor do?
It measures the absolute pressure of the metered air in the intake manifold and reports it to the ECM, which uses that data to help calculate engine load, fuel delivery, and ignition timing.
Will the AS668 fit my vehicle?
It is a direct-fit replacement for the 2016-2019 Cadillac CT6 with the V6-3.0L engine. Check the Buyer's Guide tab to confirm the fit for your vehicle.
What are signs a MAP sensor may need replacing?
Common signs include rough idle, hesitation, reduced fuel economy, or a stored check-engine code. These can have other causes, so diagnose before replacing.
Does a bad MAP sensor cause a rich or lean condition?
An inaccurate manifold-pressure signal can lead the ECM to miscalculate fuel, which may cause a rich or lean condition if the sensor is the cause.
What is the manufacturer part number?
The manufacturer part number is AS668 from Standard Ignition.
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.