Race Core Knowledge base

Sensors & outputs Pressure

sensor Pressure Draft

Digital oil pressure

Oil-pressure sender with a digital output · sensor · Pressure

“Digital” on the box is not a pinout. Some senders are still a 0.5–4.5 V transducer. Some are a frequency or a serial output. Race Core’s published oil-pressure landing is Analog Volt 6, and that landing only works for the voltage kind. Meter the signal before you choose a pin.

Digital oil pressure

Typical parts: the digital oil-pressure sender sold for Race Core logging. No order number is printed in this library — read the body.

Warning — Draft. This page does not assign A, B, and C. A wrong guess puts 5 V onto a signal pin or lands a frequency waveform on Analog Volt 6, where it looks like noise.

Device pinout

Looking into the connector, locking tab at the top. Three cavities. Label them only after a key-on measurement.

Digital oil pressure pinout

  • Connector: 3-way on the sender. Functions are not published for this part.
  • Layout (looking into the part): A · B · C; polarising key top
Device pinFunctionTypeRace CoreTunerStudio
Meter5 V or ground5 VC9 / C21 / C32, or sensor GND5 V Sens 1 / Sensor GND
MeterThe other of 5 V or groundGroundC1–C8 / C29 / C31Sensor GND
SignalSee the two cases belowSignalC26, or a free digital input TBDAnalog Volt 6, or a digital channel

Wiring notes

  • Key-on, engine off, sensor in free air or at 0 psi: if the signal pin sits near 0.5 V and climbs as you pressure-test the sender, it is the analog sensor. Land it exactly as the oil pressure page: signal C26, Analog Volt 6, 5 V from 5 V Sens 1, return to sensor ground.
  • If the signal pin is a square wave that changes with pressure, it is not Analog Volt 6. Use a free digital input and write the cavity on the lid. Digital 1 (B10) and Digital 2 (B1) are crank and cam in the default map. Digital 3 (B2) is flex fuel or VSS. There is no published default for oil-pressure frequency. TBD means TBD.
  • A one-wire gauge sender and a dummy-light switch are neither of the cases above. They do not land on a Race Core analog input.
  • Do not share this 5 V pin with a Hall sensor that needs 12 V.

Failure modes

  • Analog Volt 6 jitters across the whole scale: a frequency sender was landed on the analog pin.
  • Reading stuck at 0 psi with the engine running: signal and ground swapped, or the sender is a switch.
  • Reading moves when the radiator fan starts: return is on power ground.

See also