P006A MAP - Mass or Volume Air Flow Correlation Bank 1

The engine control module compares the air quantity measured by the mass air flow sensor with the quantity it calculates from manifold pressure, engine speed and temperature. P006A is set when the two deviate too far. A typical cause is an exhaust gas recirculation valve that does not close: recirculated exhaust raises manifold pressure without passing the air flow sensor. Air leaks, a leaking crankcase ventilation hose or a dirty sensor have the same effect. Each sensor can be electrically fine on its own; regulations require such plausibility checks for input sensors with a code of their own.

Likely causes

Symptoms

• Check engine light on
• Rough running
• Slight hesitation when accelerating

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, static.nhtsa.gov, en.wikipedia.org.