Powertrain, generic (extended)

P2CD7 Turbocharger/Supercharger Boost Sensor D Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

With P2CD7 the boost sensor D signal is electrically valid but does not fit the other pressure readings or the engine's air model. No manufacturer documents this code publicly; the checks used for sensor A show what it would cover. Ford's 2024 petrol summary compares barometric, manifold and boost pressure at key-up after at least 10 s off, allowing roughly 2.1 to 2.7 inHg between pairs, and repeats a two-way comparison at low throttle below 1,500 rpm. The GM-designed Saab 2.0 turbo expects 50 to 115 kPa with the engine stopped and treats deviations as a two-trip Type B fault. Typical reasons are a blocked or leaking pressure tap, oil in the sensor port and drift. Unlike P2CD6, P2CD8 and P2CD9, wiring is rarely to blame here. Expect a lamp and reduced boost.

Likely causes

Sensor D drifted or contaminated with oil
Leaking seal or blocked port at the sensor's measuring point
Charge air leak in the section monitored by sensor D
Sensor with the wrong pressure range fitted

Symptoms

  • Warning lamp on
  • Boost limited, weaker acceleration
  • Scan tool shows sensor D value differing from barometric pressure with the engine off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–400
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

boost pressure sensor dwiring harnessecm

Related codes

P2CD6P2CD8P2CD9P25F3P0236P0240

References: law.cornell.edu, fordservicecontent.com, saabwisonline.com.