P006A code meaning
MAP - Mass or Volume Air Flow Correlation Bank 1
Powertrain system Generic code P00xx codes Check engine light
What P006A means
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.
P006A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P006A
- Check engine light on
- Rough running
- Slight hesitation when accelerating
Common causes of P006A
- Most likelyEGR valve dirty or sticking open
- PossibleAir leak or crankcase ventilation hose leaking
- PossibleMass air flow sensor dirty or manifold pressure sensor faulty
- Less likelyAir filter or intake restricted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR valveMass air flow sensorManifold absolute pressure sensorPcv hose
What each part of P006A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 6A | The exact fault in that area. |
What to do next
- Note P006A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P006A
What does P006A mean?
P006A means "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. It is a generic code, so it means the same on every make.
Is it safe to drive with P006A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P006A fail an emissions test?
Yes, it can. P006A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P006A to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P006A clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.