Powertrain, generic (extended)

P210A Throttle Actuator B Control Motor Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

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

Symptoms

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–800
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

throttle actuator bthrottle motor bthrottle harness

Related codes

P2100P210BP210CP210DP211C

References: gsi.ext.gm.com, static.nhtsa.gov, fordservicecontent.com.