Manifold/boost pressure sensors (MAP)

The intake manifold pressure sensor measures the absolute pressure in the intake manifold.

The intake manifold pressure, together with the engine speed and the intake air temperature, is used to calculate the intake air mass.

The boost pressure sensor measures the absolute pressure downstream of the turbocharger. It is used to calculate a correction value for the boost pressure. A temperature sensor can also be integrated as an option, recognizable by the 4-pin instead of 3-pin connector.

Consequences of a defective sensor

• Fluctuating idling speed
• Power loss
• Dropouts during acceleration
• The engine indicator light comes on
• Error message P0105 (intake manifold pressure sensor) or P0109 (boost pressure sensor)

Typical causes of failure

• Damaged measuring elements
• Internal short circuits
• Missing supply voltage, earth connection
• Contaminated vacuum connection
• Cracked or damaged vacuum line

Troubleshooting tips

• Check the sensor for damage
• Reading out the fault memory
• Check the vacuum seal, the connection plug and the wiring

Advantages

• OE quality
• seven sensor types for the most common vehicle models from A – like Alfa Romeo, to M – like Mini, to V – like Volkswagen
• Also for light commercial vehicles