The rail pressure sensor is reporting below its valid voltage range. The ECU has no trustworthy pressure reading, so it defaults to a safe map.
P0192 — also written PO192, P 0192, 0192 — is the OBD-II code for fuel rail pressure sensor circuit low input. Same code, same fix: this page covers every spelling of it.
P0192 is a fuel & air fault code, typically costing £120–£480 to put right in a UK garage.
What causes P0192?
- Failed rail pressure sensor
- Short to ground in the signal wire
- Lost 5V reference from the ECU
- Water in the connector
How P0192 is fixed
- Back-probe the sensor for 5V reference and signal
- Replace the rail pressure sensor
- Repair the loom short
P0192 repair cost in the UK
Most P0192 repairs land between £120–£480 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P0192?
Expect limp mode or a no-start. Recover rather than drive far.
Urgency: high.