P2073: 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 Idle. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Powertrain
Symptoms
- The engine may idle unevenly or hesitate at low load.
- A warning light, weak response or higher fuel use may also occur.
Possible causes
- At idle, MAP, MAF and throttle-position signals may not correlate; this does not prove any one sensor is defective.
- An intake-air leak or inaccurate MAP or MAF signal can upset the comparison.
- Damaged wiring and, where fitted, EGR or intake-air-cooler leaks are other possibilities.
What to check
- Read P2073 and related codes, then compare live MAP, MAF and throttle data at idle.
- Inspect intake hoses, clamps, wiring and sensor connectors for leaks or damage.
- If unclear, examine EGR operation and intake sealing with appropriate workshop tests.
Also written as: P2073-00, P207300 (some scan tools add the fault-type byte, e.g. -00).