All codes › P0191
P0191: Fuel Rail Pressure Sensor "A" Circuit Range/Performance
What it means
The fuel rail pressure sensor reading is out of its expected range.
Severity: Medium Fuel pressure readings unreliable; may stall.
Common causes
- Failed rail pressure sensor
- Wiring fault
- Actual pressure problem (pump/regulator)
- Connector corrosion
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Rarely DIY. Rail pressure sensors on DI engines need a depressurized system.
Repair cost
SEEDED ESTIMATE Roughly $70–$360
Most likely repair: temp/pressure/position sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Temp/pressure/position sensor | $15 | $120 | Editorial placeholder, parts price not yet cited |
| Labor 0.5–1.5 hr | $50 | $240 | $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 P0191 are verified.
Verified reader invoices for P0191: 0. Share your repair bill to help build real costs.
Tools that can read P0191
- 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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