P010B code meaning
Mass or Volume Air Flow Sensor B Circuit Range/Performance
Powertrain system Generic code P01xx codes Check engine light
What P010B means
Sensor B is a second mass air flow sensor in a second intake path, found on engines with two air filter boxes – for example the Nissan VR30DDTT twin-turbo V6 (where sensor B belongs to bank 2) or GM's 3.0 litre twin-turbo V6. P010B is the plausibility fault of sensor B: the signal is electrically valid but does not fit. GM checks it like sensor A against a model built from the other sensors (manifold pressure, boost, throttle, sensor A) and fails it above 20 g/s deviation, with two trips. For the VR30DDTT Nissan names a loose or leaking left-hand intake pipe as the main cause and warns against touching or dismantling the sensor. Other causes match P0101: a soiled element, a clogged filter on that side or a boost leak.
P010B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P010B
- Check engine light on
- Lack of power, hesitation
- Rough idle
- Bank 2 mixture codes (P0174) possible
Common causes of P010B
- Most likelyIntake pipe on the sensor B side leaking or not seated
- Most likelySensor B element contaminated (oil, dust)
- PossibleAir filter on that side clogged or wrongly fitted
- PossibleBoost leak on that bank, or sensor/connector problem
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Mass air flow sensor bIntake ductAir filter
What each part of P010B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1 | Area: fuel and air metering. |
| 0B | The exact fault in that area. |
What to do next
- Note P010B 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 P010B
What does P010B mean?
P010B means "Mass or Volume Air Flow Sensor B Circuit Range/Performance". Sensor B is a second mass air flow sensor in a second intake path, found on engines with two air filter boxes – for example the Nissan VR30DDTT twin-turbo V6 (where sensor B belongs to bank 2) or GM's 3.0 litre twin-turbo V6. It is a generic code, so it means the same on every make.
Is it safe to drive with P010B?
Drive gently and only to a workshop. With P010B the car can go into limp mode (reduced power) to protect itself.
Will P010B fail an emissions test?
Yes, it can. P010B 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 P010B to fix?
Difficulty: easy. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P010B 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.