Powertrain, generic (extended)

P2C24 Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2C24 is stored when the position signal of exhaust heat exchanger bypass flap A drops below its permitted band. Typical reasons are a signal wire shorted to ground, an open sensor supply or an actuator whose sensor has failed low. CARB requires engine modules to check such inputs for readings outside their range and to keep separate codes for low, high and open where feasible. No manufacturer publishes P2C24 itself; Ford documents only the general circuit code P2C22 and the performance code P2C23 for the same sensor on its full hybrids, where SSM 53003 replaces the heat exchanger actuator on the F-150. An older Ford patent notes that such flaps often had no sensor at all, so the code only applies to actuators that report position. Warm-up may be slower; the MIL is expected.

Likely causes

Position signal wire shorted to ground near the exhaust
Open or missing 5 V supply to the position sensor
Position sensor inside the actuator failed low
Water in the actuator connector

Symptoms

  • Check engine light
  • Heat recovery switched off, slower warm-up

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.5–3 h

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

Parts involved

exhaust heat exchanger bypass valve a pos sensorwiring harnessecm

Related codes

P2C22P2C23P2C25P237D

References: law.cornell.edu, static.nhtsa.gov, patents.google.com.