P26ED: Engine Sound Control B Circuit Low

P26ED concerns the second sound actuator and indicates a drive line pulled toward ground. A conductor rubbed bare on the exhaust bracket, a pinched loom or corrosion bridging the pins of a wet plug are the classic culprits, along with a shorted coil inside the actuator. No maker publishes this code or its limits; the A counterpart P26DC appears in Ford's 2014 code list, which is the closest reference. Where the second flap sits on the other exhaust branch, its wiring often takes a different route under the car than circuit A, so the A side being healthy says little about B. In everyday use the sound feature loses part of its effect, while engine power is not affected.

Symptoms

• Check engine light
• Second flap does not respond, sound only partly changes

Most likely causes

• Insulation of the actuator B wire worn through against metal
• Corroded or wet connector at actuator B
• Short circuit inside actuator B

What to check, in order

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

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

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P26ED means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 6: Control modules and outputs
• ED: Specific fault in that system

Frequently asked questions

Can I keep driving with code P26ED?

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 P26ED?

The most common causes are: insulation of the actuator B wire worn through against metal; corroded or wet connector at actuator B; short circuit inside actuator B.

Related codes

• P26ECEngine Sound Control B Circuit/Open
• P26EEEngine Sound Control B Circuit High
• P26EFEngine Sound Control B Circuit Performance
• P26DCEngine Sound Control A Circuit Low
• P2BF9Exhaust Flow Control Valve B Control Circuit Low

Sources

• law.cornell.edu: 13 CCR 1968.2
• performanceparts.ford.com: 2014 BOSS 302S OBDII Codes

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.