Powertrain, generic (extended)

P2677 Air Cleaner Inlet Control Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The counterpart to P2676: the controller sees the drive line of the air cleaner inlet flap at too high a voltage, so it cannot pull the actuator in when asked. A short from the control wire to battery voltage, a failed output stage, or an open coil that leaves the line at supply level produce this pattern. In Ford's 2014 gasoline code list P2677 appears next to P2676, again as a continuous check without the MIL mark, meaning a stored code need not light the warning lamp. Beyond that list no manufacturer documents P2677 publicly. CARB's rules for monitored outputs explain why the driver stage is watched at all. The flap typically remains in its unpowered default position, and the car drives normally.

Likely causes

Control wire shorted to battery voltage
Open coil in the flap actuator
Failed output stage in the control module

Symptoms

  • Code stored, often without warning lamp
  • Inlet flap remains in its default position

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–300
Time0.3–1.5 h

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

Parts involved

air cleaner inlet valvesolenoidwiring harness

Related codes

P2675P2676

References: performanceparts.ford.com, law.cornell.edu.