All codes › P0103
P0103: Mass Air Flow Circuit High Input
What it means
The MAF sensor signal voltage is too high, reading more air than is possible.
Severity: Medium Rich running and black smoke are possible.
Common causes
- Shorted MAF signal wire
- Failed MAF sensor
- Poor sensor ground
- Electrical interference from nearby wiring
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Check MAF ground and wiring with a multimeter; sensor swap is a 10-minute job.
Repair cost
SEEDED ESTIMATE Roughly $80–$310
Most likely repair: mass air flow sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Mass air flow sensor | $64 | $226 | Typical listed retail range, source (one $568 outlier excluded) |
| Labor 0.2–0.5 hr | $20 | $80 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0103 are verified.
Verified reader invoices for P0103: 0. Share your repair bill to help build real costs.
Tools that can read P0103
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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