Credov

P0651 fault code: what it means

P0651: Sensor reference voltage B circuit (5 V supply).

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. shorted sensor on the shared 5 V supply
  2. wiring chafe
  3. ECM

P0651 by make

Isuzu

Sensor reference voltage B circuit (5 V supply).

Usual causes: shorted sensor on the shared 5 V supply; wiring chafe; ECM

Not sure what P0651 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.