Powertrain
generic / SAE
P2073
Manifold Absolute Pressure / Mass Air Flow - Throttle Position Correlation at Idle
At idle, the relationship between MAP/MAF and throttle position does not match the calibrated map — typically a vacuum leak, dirty MAF, sticking throttle plate, or sensor drift.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 73
Possible causes
- Vacuum leak — cracked hose, gasket, or PCV high
- MAF sensor contaminated medium
- Carbon buildup at throttle plate medium
Symptoms
- Check engine light on
- Power loss, hesitation under acceleration
- Rough or unstable idle
- Increased fuel consumption
- Possible difficulty starting
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 40–600 €
- Estimated time: 0.3–3 h
- Component: manifold absolute pressure sensor
- Component: mass air flow sensor
- Component: throttle position sensor
- Component: intake manifold
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012