P0AB7: Engine Mount B Control Circuit Low

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.

Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.

Symptoms

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

Most likely causes

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

What to check, in order

Start with the simplest. You can tick off each step.

Check the battery, connectors, and wiring
With the connector unplugged, check whether the signal wire is making contact with ground.
Read the live data with a scanner
Follow the manufacturer's service manual

Good to know

Repair difficulty: medium

What each character of P0AB7 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
A: Hybrid or air and fuel
B7: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0AB7?

If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.

What causes code P0AB7?

The most common causes are: control wire chafed through and shorted to ground; mount solenoid coil shorted internally; water ingress in the mount connector.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.