What it means
The relationship between manifold absolute pressure and turbocharger inlet pressure is implausible. Indicates a leak between turbo inlet and intake manifold or a sensor fault.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The MAP sensor measures pressure in the intake manifold, and the turbocharger or supercharger inlet pressure sensor measures pressure before the forced-induction unit. The control module sets P006C when these readings do not correlate as expected, which can indicate a sensor or wiring fault, an air leak, or a restriction.
Common causes
Most likely first.
- MAP, turbocharger inlet-pressure sensor, or associated wiring fault
- Air leak or restriction affecting the pressure readings
Symptoms
- Check engine light on
- Possible reduced engine power
How to diagnose it
- Save freeze-frame data and compare MAP and turbocharger or supercharger inlet pressure readings in live data.
- With the engine off, check whether the pressure readings are plausible relative to barometric pressure and each other.
- Inspect the intake duct between the inlet sensor and forced-induction unit, and the charge-air path to the manifold, for loose joints, leaks, or restrictions.
- Check both pressure sensors' connectors and wiring for damage, corrosion, or loose pins.
- Test the MAP and inlet pressure sensor circuits and responses against the manufacturer's specification.
Common fixes
- Reseat loose intake or charge-air connections.
- Repair a leaking or restricted intake hose or duct.
- Repair damaged wiring or corroded terminals at either pressure sensor.
- Replace a pressure sensor only if its readings fail the manufacturer's checks.
Can I keep driving?
If power remains normal, use gentle throttle and avoid towing or hard acceleration until the fault is checked. If power drops or the engine behaves abnormally, stop driving; a leak or pressure-reading fault can impair boost control.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.