P212B code meaning
Throttle Position Sensor/Switch G Circuit Range/Performance
Powertrain system Generic code P21xx codes Check engine light
What P212B means
P212B means throttle signal G is electrically valid but its value does not fit. GM's 2023 table 23OBDG07 applies it to sensor 2 of the bank 2 throttle body on a twin-throttle engine: the code sets when the angle derived from sensor 2 differs from that of sensor 1 by more than about 5-6.25 %, or from the angle modelled from manifold pressure by more than 9 %, in one trip; the 2024 table repeats the check. Nissan uses P212B on the 2021-2023 Rogue with the 1.5 L KR15DDT engine; bulletin NTB23-021 cures a lit MIL without drivability complaints by ECM reprogramming. Circuit faults are P212A and P212C-P212E. Depending on the cause the engine may run normally or limit power.
P212B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P212B
- MIL on, often without noticeable driving problems
- Reduced power if the plausibility fault persists
- Uneven idle on twin-throttle engines
Common causes of P212B
- PossibleECM software setting the code without a real fault (update available)
- PossibleSensor G drifted or worn, disagreeing with its partner sensor
- PossibleDeposits or sticking plate making the angle disagree with airflow
- Less likelyContact resistance at the throttle body connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle position sensor gElectronic throttle bodyECM
What each part of P212B 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. |
| 2B | The exact fault in that area. |
What to do next
- Note P212B 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 P212B
What does P212B mean?
P212B means "Throttle Position Sensor/Switch G Circuit Range/Performance". P212B means throttle signal G is electrically valid but its value does not fit. It is a generic code, so it means the same on every make.
Is it safe to drive with P212B?
Drive gently and only to a workshop. With P212B the car can go into limp mode (reduced power) to protect itself.
Will P212B fail an emissions test?
Yes, it can. P212B 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 P212B to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P212B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.