Powertrain, generic (extended)

P2C35 Crankcase Pressure Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2C35 is set when the signal of crankcase pressure sensor B sits above the highest voltage the sensor can legitimately produce. That usually means an interrupted signal wire pulled up inside the module, a broken sensor ground, or a short from the signal to the 5 V supply or to battery voltage. Maserati names P2C35 in bulletin MAS002969/A, on the MY21 blow-by sensor of the F160 six and F154 eight-cylinder engines, together with P2C33/P2C34 and the A-sensor codes; besides wiring and pins it lists a faulty sensor, outdated or corrupted ECM software. Ford's analogue sensor A uses P051D above 4.56 V for 5 s as its counterpart. Because the ventilation monitor depends on this signal, the MIL lights even though the engine runs normally.

Likely causes

Open signal wire or unplugged connector
Missing sensor ground (low reference)
Signal shorted to 5 V reference or battery voltage
Faulty sensor or outdated engine control software

Symptoms

  • MIL on
  • Crankcase ventilation monitor not completed
  • Usually no driveability change

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

Related codes

P2C32P2C33P2C34P2C36P051D

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