Fault code P0069 – a step-by-step guide to diagnosing and fixing it

Error code P0069 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a correlation error between the manifold absolute pressure (MAP) and the barometric pressure sensor (BARO). This DTC P0069 indicates that the values of both sensors are not plausible in relation to each other and the engine control unit has registered a malfunction.

What are the possible causes of this error code?

• Defective MAP sensor (manifold absolute pressure sensor)
• Damaged barometric pressure sensor
• Blocked or leaking vacuum lines
• Defective plug connections or cable breakage
• Dirty or damaged sensors
• Faulty engine control unit software
• Mechanical problems in the intake tract
• Defective throttle valve or its position sensor

Which symptoms occur in parallel with error code P0069?

• Engine performance: noticeable power reduction and poor acceleration
• Idle problems: Unsteady idling or stalling of the engine
• Fuel consumption: Increased consumption due to incorrect mixture formation
• Starting behavior: Difficult starting, especially when the engine is cold
• Check engine light: Permanent illumination of the warning light
• Emergency running program: Engine runs in emergency running mode with reduced power

How can the problem with error code P0069 be rectified?

• The repair requires a systematic diagnosis of the pressure sensors and their lines.
• Check MAP sensor and barometric pressure sensor with a multimeter and replace if defective (costs: €50-150 per sensor)
• Check all vacuum lines for cracks, blockages or loose connections and replace damaged hoses
• Clean the plug connections of both sensors, check for corrosion and replace if necessary
• Remove sensors and clean thoroughly, treating contacts with electronic spray
• Update the engine control unit software or have the control unit replaced if defective (costs: €500-1200)
• Check intake tract for leaks and replace defective seals or hoses
• Clean the throttle valve and calibrate its position sensor or replace it if defective