P210A: Throttle Actuator B Control Motor Circuit/Open

Throttle actuator B only exists on engines with two electronic throttles, typically one per cylinder bank. P210A reports an electrical fault, mainly an open line, in the drive of that second motor. GM's 2023 table 23OBDG07 checks the bank 2 H-bridge just like bank 1: open load above 200 kOhm (0.8 s), driver overtemperature and short to ground below 0.5 Ohm, each one trip. Ducati links P210A to the rear-bank throttle motor of its V4 and points to moisture in the ECU connector. Ford's 2024 summary uses P210A as base code for all faults of its second throttle body. The engine runs on reduced power. Bank 1 is P2100; low/high circuit faults are P210C/P210D, position errors P210B.

High severity. Can I keep driving?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.

Symptoms

Reduced power, one bank breathing poorly
Engine warning lamp on
Rough running or limp mode

Most likely causes

Moisture or corrosion in the throttle B or ECU connector
Broken motor wire to throttle body B
Open winding in throttle motor B
Faulty bank 2 output stage in the ECU

What to check, in order

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

Check the pedal and throttle connectors
Check the continuity of the wire between the component and the control module.
Use live data to confirm that both sensors rise smoothly and consistently
Clean the throttle if it has carbon buildup
Run the relearn procedure with the scanner if the manufacturer requires it
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 P210A means

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

Frequently asked questions

Can I keep driving with code P210A?

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 P210A?

The most common causes are: moisture or corrosion in the throttle B or ECU connector; broken motor wire to throttle body B; open winding in throttle motor B.

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.