Sensors & outputs Pressure
Oil pressure
0–5 V oil transducer · sensor · Pressure
Ratiometric 0–5 V pressure transducer, typically 0–100 or 0–150 psi. Default Analog Volt 6. A dummy-light switch is not this sensor.
Typical parts: GM 0–5 V oil (12616646 family); AEM 30-2131-100; Autosport Labs 0–150 psi
Device pinout
Looking into the sensor, locking tab at the top. Meter 5 V vs ground before you trust a colour.
- Connector: 3-way on the transducer (GM / Delphi / aftermarket)
- Layout (looking into the part): A · B · C; polarising key top
| Device pin | Function | Type | Race Core | TunerStudio |
|---|---|---|---|---|
| A | 5 V supply (common GM) | 5 V | C9 / C21 / C32 | 5 V Sens 1 |
| B | Sensor ground | Ground | C1–C8 / C29 / C31 | Sensor GND |
| C | Oil-pressure signal | Signal | C26 | Analog Volt 6 |
Wiring notes
- Aftermarket 0–5 V senders often use A ground, B 5 V, C signal. Key-on: one pin is 5 V, one is ground, one sits at the 0 psi voltage (~0.5 V).
- Do not use a one-wire gauge sender. Race Core analog inputs want 0–5 V, not a high-current gauge element.
- Set the 0 psi and 100 / 150 psi voltages in TunerStudio from the datasheet, then confirm with a mechanical gauge at idle and 3,000 rpm.
- A sender that outputs a square wave is not this page. Meter it, then use Digital oil pressure.
- A combined Bosch fluid sensor uses Bosch P+T. Pressure can still land on C26.
Failure modes
- Key-on, engine off, the channel reads mid-scale: 5 V and signal are swapped, or the calibration zeros are wrong. A healthy 0 psi voltage is near 0.5 V on most 0.5–4.5 V senders.
- Pressure falls when the fan starts: return is on power ground.
- A one-wire sender pegs the input: it is a gauge element, not a 0–5 V sensor.