Powertrain, generic (extended)

P2C32 Crankcase Pressure Sensor B Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

A crankcase pressure sensor tells the engine module how the pressure in the crankcase ventilation compares with ambient, mainly so it can detect a disconnected or leaking breather line. P2C32 is the general circuit fault of sensor B: its signal is missing or cannot be decoded at all, without saying high or low. No manufacturer documents this exact code publicly. Ford shows the pattern for sensor A: on digital SENT sensors, invalid frames or signal patterns set P051A within 5 s, while analogue sensors report the range, low and high codes. Maserati lists the B codes P2C33–P2C35 for the blow-by sensor of its 2021 V6 and V8, but not P2C32. CARB requires the ventilation system to be monitored; with the sensor down that check cannot run, so the MIL is to be expected.

Likely causes

Unplugged, loose or corroded sensor connector

Open or chafed wire between sensor and engine module

Sensor electronics failed

Engine module input or software fault

Symptoms

MIL on
Crankcase ventilation leak check not available
Usually no change in driveability

Repair estimate

DifficultyMediumDIY possible

Parts and labour€50–400

Time0.5–2 h

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

Parts involved

crankcase pressure sensor bwiring harnessecm

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.