P210B: Throttle Actuator B Control Motor Circuit Range/Performance

P210B is the position-control check for the second throttle on twin-throttle engines. The controller compares the commanded opening of throttle B with the measured one; GM's 23OBDG07 table flags a deviation beyond a rate-dependent limit for 0.5 s, one trip. Ford lists P210B with MIL and wrench lamp for its dual-throttle applications (2020-2023) and from 2024 shows it as P210A with byte 95, the type Ford describes as cross-wired on the A side. Mercedes-AMG M177 V8s store it as throttle actuator 2 signal above limit, together with P2101; the bulletin blames high resistance in the connector pins of both actuators. Bank 1 counterpart is P2101; an open circuit is P210A, motor current P211C.

Symptoms

• Engine warning lamp and reduced power
• Uneven running between the two banks
• Limp mode

Most likely causes

• High resistance at throttle B connector pins
• Deposits or ice making throttle B sluggish
• Worn gears or motor in throttle body B
• Motor leads swapped after repair work

What to check, in order

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

1. Check the pedal and throttle connectors
2. Compare the reading with other engine data while varying the engine speed.
3. Use live data to confirm that both sensors rise smoothly and consistently
4. Clean the throttle if it has carbon buildup
5. Run the relearn procedure with the scanner if the manufacturer requires it
6. Replace the part identified by the diagnosis

Good to know

• Repair difficulty: medium
• It can trigger limp mode.
• It affects emissions.

What each character of P210B means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 1: Air and fuel
• 0B: Specific fault in that system

Frequently asked questions

Can I keep driving with code P210B?

Be careful: the car may suddenly lose power. If it goes into limp mode, get off the highway and calmly make your way to a repair shop.

What causes code P210B?

The most common causes are: high resistance at throttle B connector pins; deposits or ice making throttle B sluggish; worn gears or motor in throttle body B.

Related codes

• P2101Throttle Actuator A Control Motor Circuit Range/Performance
• P210AThrottle Actuator B Control Motor Circuit/Open
• P211CThrottle Actuator B Control Motor Current Range/Performance
• P211DThrottle Actuator B Control Throttle Body Range/Performance
• P211AThrottle Actuator B Control System - Stuck Open
• P211BThrottle Actuator B Control System - Stuck Closed

Sources

• gsi.ext.gm.com: 23OBDG07
• fordservicecontent.com: OBD Operations Summary Gasoline 2020 2023
• fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
• static.nhtsa.gov: MC 11036076 0001

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.