P0069 Manifold Absolute Pressure - Barometric Pressure Correlation

P0069 indicates manifold absolute pressure and barometric pressure correlation is implausible. The MAP and BARO values do not agree when expected.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the MAP sensor before comparing key-on pressure data and checking the sensor port and wiring.

Symptoms of P0069

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0069

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Compare MAP, BARO, throttle angle, engine load, RPM, and key-on engine-off pressure readings against local atmospheric pressure.
Inspect MAP sensor wiring, vacuum source, intake leaks, clogged ports, barometric sensor data, and related boost or airflow codes.
Check whether the mismatch appears only at key-on, idle, under boost, after altitude changes, or with a restricted intake.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.