U0625Lost Communication With Fuel Rail Pressure Sensor Bank 1
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Direct-injection engines increasingly use rail pressure sensors that send pressure, and sometimes fuel temperature, digitally via SENT. U0625 says the engine controller has lost this link for the bank 1 sensor. GM's 2025 tables (25OBDG03A) set it when the SENT line stays low with at most four pulses received, in 400 of 500 samples taken every 6.25 ms, Type A; a line stuck high is GM's own code U101B, and corrupted or stale frames are logged as P128F. In 23OBDG07 and 24OBDG07 GM stores U0625 together with U101B when the line sits high or low for 0.5 s, again in one trip, while protocol errors go to U1374. As long as the code is active, GM suspends the fuel temperature checks of the same sensor. The bank 2 sensor has U0665; analog circuit faults are P0190 to P0194. Expect reduced power or hard running.
- What you may notice
- Check engine light in the first trip
- Reduced power, rough running or hard starting
- Further SENT codes such as U101B stored at the same time
- Likely causes
- LikelySENT signal wire shorted to ground or to voltage, or open
- PossibleFuel or oil contamination, corrosion or loose pins in the sensor connector
- PossibleRail pressure sensor electronics failed (on some engines only with the rail)
- RareSENT input of the engine controller faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.