What Does P006A Mean?
The ECM has detected a correlation error between the MAP (Manifold Absolute Pressure) sensor and the MAF (Mass or Volume Air Flow) sensor on Bank 1. The readings from these two sensors should follow a predictable mathematical relationship based on engine speed, temperature, and throttle position. When the values don't agree, the ECM cannot accurately calculate fuel delivery. The driver may experience hesitation, poor fuel economy, or rough running.
Common Causes
30%
Contaminated or failed MAF sensor providing inaccurate airflow readings
25%
Vacuum leak introducing unmetered air that the MAF doesn't measure but the MAP detects
20%
Faulty or drifted MAP sensor
15%
Restricted air filter causing MAF to read lower than expected for the MAP reading
10%
Intake air leak between the MAF sensor and throttle body (post-MAF leak)
Diagnostic Steps
1
Monitor MAF and MAP sensor PIDs simultaneously at idle and at 2500 RPM. At idle, typical MAF is 2-7 g/s for a 4-cyl (3-10 g/s for V6/V8) with MAP at 15-22 inHg vacuum. Calculate the expected correlation and identify which sensor deviates.
2
Perform a smoke test on the intake system from the throttle body back to the air filter housing. A post-MAF leak (between MAF and throttle body) is a common cause — the MAF doesn't measure the leaked air but the MAP sees its effect.
3
Clean the MAF sensor with dedicated MAF cleaner. A contaminated sensing element reads low, causing the MAP/MAF correlation to fail. Retest after cleaning and clearing codes.
4
Check the MAP sensor at KOEO — it should read atmospheric pressure. If it reads significantly off, the MAP sensor is likely at fault.
5
Inspect the air filter and intake ducting for restrictions. A severely clogged filter will reduce MAF readings while the MAP sensor may still read relatively normally due to engine vacuum compensation.
6
Check for TSBs — some manufacturers have updated MAP/MAF correlation thresholds to reduce false triggers.
Estimated Repair Cost
$50 - $500
Parts + labor, varies by vehicle and location
The ECM has detected a correlation error between the MAP (Manifold Absolute Pressure) sensor and the MAF (Mass or Volume Air Flow) sensor on Bank 1. The readings from these two sensors should follow a predictable mathematical relationship based on engine speed, temperature, and throttle position. Wh...
The most common cause of P006A (MAP - Mass or Volume Air Flow Correlation Bank 1) is: Contaminated or failed MAF sensor providing inaccurate airflow readings
Typical repair costs for P006A range from $50 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drivable but may exhibit hesitation or surging. The ECM is receiving conflicting airflow data, so fuel delivery calculations may be inaccurate. Lean conditions can cause misfires and catalytic converter damage; rich conditions waste fuel. Diagnose within 1-2 weeks.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P006A to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
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