Share a caseSign in
FuelSeverity High: diagnose before driving on

P0192Fuel Rail Pressure Sensor "A" Circuit Low

What it means

The fuel rail pressure sensor signal voltage is lower than the sensor can normally produce (usually below about 0.2 V on a 0–5 V sensor). Most often the signal wire is shorted to ground or the 5 V supply is missing.

Symptoms

  • No start or long cranking
  • Limp mode with low power
  • Stalling or rough running

Common causes

  • Signal wire shorted to ground or chafed through
  • 5 V reference open, or pulled down by another faulty sensor on the same supply
  • Failed fuel rail pressure sensor
  • Water or corrosion in the connector

What to check first

  1. With the key on, measure the 5 V reference at the connector (about 4.8–5.1 V)
  2. Back-probe the signal and watch it while wiggling the harness
  3. Unplug sensors that share the 5 V reference one at a time and see whether the supply recovers
Can I drive with P0192? Not recommended. P0192 can lead to stalling, limp mode or engine damage; diagnose it before driving further.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0192

Diesel rail pressure sensorWiring, typical values, multimeter and scope tests

Cases with P0192 (0)

Share yours

No published cases with this code yet.

Colleagues asking about P0192

Ask for help

Stuck on P0192? Describe what you measured and ask the community.

P0192: questions and answers

What does P0192 mean?

P0192: Fuel Rail Pressure Sensor "A" Circuit Low. The fuel rail pressure sensor signal voltage is lower than the sensor can normally produce (usually below about 0.2 V on a 0–5 V sensor). Most often the signal wire is shorted to ground or the 5 V supply is missing.

What are the symptoms of P0192?

No start or long cranking. Limp mode with low power. Stalling or rough running.

What causes P0192?

Signal wire shorted to ground or chafed through. 5 V reference open, or pulled down by another faulty sensor on the same supply. Failed fuel rail pressure sensor. Water or corrosion in the connector.

How do you diagnose P0192?

1. With the key on, measure the 5 V reference at the connector (about 4.8–5.1 V) 2. Back-probe the signal and watch it while wiggling the harness 3. Unplug sensors that share the 5 V reference one at a time and see whether the supply recovers

Can I drive with P0192?

Not recommended. P0192 can lead to stalling, limp mode or engine damage; diagnose it before driving further.