Code
P0191
Fuel
Fuel rail pressure sensor range / performance
The rail pressure sensor reading is not plausible.
Advertisement
Most likely causes
- Faulty pressure sensor
- Weak pump
- Restricted filter
Symptoms you may notice
- Check engine light
- Hard start
- Poor power
Checks to run
- Compare sensor to a gauge
- Check fuel pressure
- Test the sensor
Tools you may need
Fuel pressure gauge
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.