P0069Manifold Absolute Pressure - Barometric Pressure Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Check engine light on
- Often no further symptoms
- Mixture or power deviations possible
- Likely causes
- LikelyManifold pressure sensor drifting
- LikelyMAP sensor hose blocked, kinked or leaking
- PossibleBarometric pressure sensor (often inside the control module) faulty
- Possible5 V reference or connector faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.