P2073: MAP/MAF - Throttle Position Correlation at Idle
The P2073 code indicates that the Engine Control Module (ECM) has detected a discrepancy between the Manifold Absolute Pressure (MAP) sensor, Mass Air Flow (MAF) sensor, and Throttle Position Sensor (TPS) signals during idle conditions. This typically means the calculated airflow based on throttle position does not match the actual airflow measured by the MAP or MAF sensors. Common causes include a dirty or faulty MAF sensor, vacuum leaks, a stuck or malfunctioning throttle body, or issues with the TPS. This code can lead to poor idle, stalling, and reduced fuel economy.
01. Most Common Causes
- Dirty or faulty Mass Air Flow (MAF) sensor
- Vacuum leak (e.g., cracked hose, intake gasket)
- Sticking or dirty throttle body
- Faulty Throttle Position Sensor (TPS)
- Faulty Manifold Absolute Pressure (MAP) sensor
02. Symptoms You Will Notice
- Rough or unstable idle
- Engine stalling at idle
- Check Engine Light illuminated
- Poor fuel economy
- Hesitation or surging during acceleration
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect for vacuum leaks using a smoke machine or propane enrichment.
Step 3: Clean the MAF sensor with MAF cleaner and recheck.
Step 4: Test the TPS and MAP sensor signals with a multimeter or scan tool.
Step 5: Inspect and clean the throttle body; check for carbon buildup.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the vehicle may stall or have poor performance, which can be dangerous in traffic.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for cleaning or simple repairs, but could be higher if sensors need replacement.