P2074: Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation… — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Powertrain
Symptoms
- Hesitation or lack of response may be most noticeable during acceleration or higher load.
- An engine warning and increased fuel consumption are possible.
Possible causes
- MAP, MAF and throttle-position readings may disagree at higher load; this does not by itself identify a failed part.
- Intake or boost-air leaks can disturb the expected airflow relationship.
- Sensor faults, damaged wiring or a leaking charge-air cooler on equipped vehicles may contribute.
What to check
- Confirm P2074 and any related codes; inspect intake and boost hoses, clamps and connections.
- Check MAP, MAF and throttle connectors, then compare live values under conditions specified for the vehicle.
- Investigate air leaks and signal plausibility before considering component replacement.
Also written as: P2074-00, P207400 (some scan tools add the fault-type byte, e.g. -00).