Powertrain, generic · Hybrid propulsion

P0AB7 Engine Mount B Control Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0AB7 means the engine controller sees the control line of active engine mount B pulled too low, the usual signature of a short to ground or an actuator coil with too little resistance. Ford's 2020-23 gasoline OBD summary lists it among the active-mount checks for bank 2: the output driver flags the fault continuously and the PCM matures it within roughly 5 seconds. Honda describes the code on the 2008 Pilot as a low-current fault in the rear mount actuator circuit. P0AB6 covers the open circuit, P0AB8 the high side, and P0A15 the same fault on mount A. The driver usually feels more engine shake at idle; drivability is otherwise unaffected.

Likely causes

Control wire chafed through and shorted to ground
Mount solenoid coil shorted internally
Water ingress in the mount connector

Symptoms

  • Check engine light on
  • Increased vibration felt through seat and steering wheel at idle

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–450
Time0.5–2.5 h

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

Parts involved

engine mount bwiring harnessecm

Related codes

P0AB6P0AB8P0A15P0A14P0A16

References: fordservicecontent.com, fenderbender.com, patents.google.com.