P210B code meaning
Throttle Actuator B Control Motor Circuit Range/Performance
Powertrain system Generic code P21xx codes Check engine light
What P210B means
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.
P210B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P210B
- Engine warning lamp and reduced power
- Uneven running between the two banks
- Limp mode
Common causes of P210B
- Most likelyHigh resistance at throttle B connector pins
- PossibleDeposits or ice making throttle B sluggish
- PossibleWorn gears or motor in throttle body B
- Less likelyMotor leads swapped after repair work
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle actuator bThrottle motor b
What each part of P210B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 0B | The exact fault in that area. |
What to do next
- Note P210B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P210B
What does P210B mean?
P210B means "Throttle Actuator B Control Motor Circuit Range/Performance". P210B is the position-control check for the second throttle on twin-throttle engines. It is a generic code, so it means the same on every make.
Is it safe to drive with P210B?
Drive gently and only to a workshop. With P210B the car can go into limp mode (reduced power) to protect itself.
Will P210B fail an emissions test?
Yes, it can. P210B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P210B to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P210B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.