Powertrain, generic · Fuel and air metering, auxiliary emission controls

P006D Barometric Pressure - Turbocharger/Supercharger Inlet Pressure Correlation Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Without boost, for example with the engine stopped or at low load, the pressure sensor ahead of the turbocharger or supercharger must read about the same as the barometric pressure sensor. P006D is set when the difference is too large; some manufacturers compare against an estimated barometric value instead and run the check once per ignition cycle. Typical causes are a faulty inlet pressure sensor, a faulty barometric sensor (often inside the control module) or a wiring or reference-voltage fault. 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

Inlet pressure sensor faulty
Barometric pressure sensor or control module faulty
Wiring, connector or 5 V reference faulty
Clogged air filter lowering pressure ahead of the compressor

Symptoms

  • Check engine light on
  • Often no further symptoms
  • Reduced boost possible

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–250
Time0.5–1.5 h

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

Parts involved

boost inlet pressure sensorbarometric pressure sensorsensor reference voltage

Related codes

P006CP0069P2227P0236

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.