P1637

P1637

Pressure sensor ahead of throttle (boost pressure sensor)

NOTE:
A fault is detected if the value of the sensor exceeds or falls below a threshold:
- [measured value + 30 hpa] < [ambient pressure - 400 hpa] (P1636) or
- [measured value - 30 hpa] < [ambient pressure + 200 hpa] (P1637)

Diagnostic conditions
- Engine speed < 1000 rpm
- Throttle position < 5 %
- No fault entered for: ambient pressure sensor or throttle potentiometer

Possible fault causes
- Loose contact or corrosion on connectors or lines
- Boost pressure sensor faulty
- Ambient pressure sensor faulty (DME control unit)