What Does P2074 Mean?
The PCM detects a correlation error between MAP/MAF sensors and throttle position under higher engine loads. This indicates an air metering problem during acceleration or sustained load conditions.
Common Causes
30%
Failed or contaminated MAF sensor reading incorrectly under load
25%
Restricted air filter or intake system reducing actual airflow
20%
MAP sensor failure or restricted vacuum line
15%
Exhaust restriction causing back pressure and airflow issues
10%
Boost leak in turbocharged applications
Diagnostic Steps
1
Step 1: Monitor MAP/MAF, throttle position, and boost pressure (if applicable) during acceleration and load conditions
2
Step 2: Inspect air filter for excessive restriction and entire intake path for blockages
3
Step 3: Test MAF sensor output at various airflow rates; compare to manufacturer specifications
4
Step 4: Check exhaust system back pressure with gauge to identify restrictions
5
Step 5: If turbocharged, pressure test intake system for boost leaks
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM detects a correlation error between MAP/MAF sensors and throttle position under higher engine loads. This indicates an air metering problem during acceleration or sustained load conditions.
The most common cause of P2074 (Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load) is: Failed or contaminated MAF sensor reading incorrectly under load
Typical repair costs for P2074 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause significant power loss under load, making highway merging or passing dangerous. Continued operation may damage catalytic converter or engine.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2074 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Air Intake and Fuel Metering
Difficulty
Type
Generic (SAE)
Recommended Tools
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