Diagnosis Information DME

P1638

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:
- < 500 hpa (P1638)
or
- > 2600 hpa(P1638)

Diagnostic conditions
- Engine speed > 80 rpm

Possible fault causes
- Loose contact or corrosion on connectors or lines
- Short circuit to B+/ground/between lines or open circuit in the lines
- Boost pressure sensor faulty
- DME control unit faulty