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

P0069 Manifold Absolute Pressure - Barometric Pressure Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

With the ignition on and the engine stopped, the intake manifold is at ambient pressure, so the manifold pressure sensor and the barometric pressure sensor (often inside the control module) must read almost the same. P0069 is set when they differ by more than a threshold. Some systems also compare the barometric reading with a value estimated from manifold pressure at wide-open throttle while driving. Altitude and weather shift both values equally and do not cause the code. 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

Manifold pressure sensor drifting
MAP sensor hose blocked, kinked or leaking
Barometric pressure sensor (often inside the control module) faulty
5 V reference or connector faulty

Symptoms

  • Check engine light on
  • Often no further symptoms
  • Mixture or power deviations possible

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–900
Time0.3–1.5 h

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

Parts involved

manifold absolute pressure sensorbarometric pressure sensormap sensor hosesensor reference voltage

Related codes

P0106P0107P0108P2227P006D

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