P010C
Mass or Volume Air Flow Sensor B Circuit Low
Fuel & air metering
Generic OBD-II
High
What it means
P010C means the "B" mass air flow sensor circuit is reading an abnormally low signal — typically a wiring short to ground, an open circuit, or a failed sensor. The MAF tells the ECM how much air the engine is drawing, so a bad low reading can throw off fueling and cause hesitation, stalling, or a drop into limp mode.
High
Can I keep driving? You can usually still drive, but expect hesitation, stalling, or a drop into limp mode; fix it before it strands you.
Common symptoms
What you'll notice
- Check-engine light on
- Hesitation, rough running, or lack of power
- Hard starting or stalling
- Reduced fuel economy or limp/failsafe mode
Common causes
Most likely first
- Mass air flow sensor B signal circuit shorted to ground or wiring openLikely
- Faulty mass air flow sensorCommon
- Corroded or loose connector at the MAF sensorCommon
- Intake air leak affecting the sensor readingLess often
- Faulty ECM/PCM (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the MAF connector and wiring for shorts, opens, or corrosion.
- Check the sensor's signal voltage against the manufacturer's spec on a scan tool.
- Inspect for intake leaks and confirm a clean, correctly seated air filter.
- Clean or replace the MAF sensor if it reads out of range; repair the wiring.
- Clear and retest; consider the ECM only as a last resort.
FAQ
Quick answers
Is it safe to drive with P010C?+
It's drivable but not ideal — because the MAF is a main fueling input, the engine may hesitate, stall, or enter limp mode. Fix it soon to avoid being stranded.
Can I just clear P010C?+
It returns quickly. A low MAF signal usually means a wiring or sensor fault that has to be repaired before the code stays off.
Related codes
Often seen with P010C
Read & clear P010C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX