The engine computer compares readings from the Manifold Absolute Pressure (MAP), Mass Air Flow (MAF), and Throttle Position (TP) sensors to ensure they agree. Code P2074 indicates that during high-load conditions, these values are out of sync, suggesting air is entering or leaving the intake system unexpectedly.
Air leaking into the intake manifold after the MAF sensor causes a discrepancy between measured air mass and manifold pressure.
Dirt or oil on the MAF sensor element leads to inaccurate air mass readings during high load.
An inaccurate or failing MAP sensor provides incorrect pressure data to the control module.
Carbon buildup or a malfunctioning throttle position sensor prevents the computer from correlating throttle angle with air intake.
Internal failure of the engine control module processing the sensor signals, though this is rare.
Yes, a severely clogged air filter can restrict airflow enough to cause the MAF and MAP sensors to report values that do not correlate with the throttle position.
No. P2074 is almost always caused by mechanical air leaks or sensor contamination; replacing the PCM without first verifying the intake system is usually unnecessary and incorrect.
Not necessarily, but it is a common first step because it is a non-invasive way to rule out sensor contamination before replacing parts.