Powertrain, generic · Hybrid propulsion

P0AB6 Engine Mount B Control Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Some engines sit on switchable or actively driven hydraulic mounts whose solenoid or actuator is energised by the engine controller. P0AB6 reports that the driver output for the second mount (B) sees an open or otherwise faulty circuit. Ford lists the code in its 2020-23 gasoline OBD summary under active mounts, assigns mount B to bank 2, monitors continuously and lets the low-level driver fault mature for about 5 seconds before storing it. On the 2008 Honda Pilot the same code covers the rear mount actuator. Mount A has the matching codes P0A14 to P0A16. Drivers mostly notice more vibration at idle or in cylinder-deactivation mode; the engine itself keeps running normally.

Likely causes

Broken or chafed control wire to the mount actuator
Corroded or loose connector at the mount (splash zone)
Mount solenoid or actuator coil open internally
Output driver in the engine controller defective

Symptoms

  • Check engine light on
  • Noticeable vibration at idle or with cylinder deactivation active
  • Cylinder deactivation may be suspended on some models

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

P0AB7P0AB8P0A14P0A15P0A16

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