In the title I used the term “engine sensor” however, I am actually going to explain 10 misunderstood parameter IDs or PIDs.

These PIDs are provided by the engine’s onboard diagnostic system and we will be looking at a service called Mode $01, which shows us live data.

The $ in mode $01 tells us it is a hexadecimal number.
Google hexadecimal if you want to know more, but you don’t need to for the purpose of this video.

We are going to be using a portion of OBD Fusion’s Diagnostic report to look at the TOP TEN mode $01 PIDs for Nissan’s 3.7 litre v6 engine known as the VQ37VHR:

Top Ten Misunderstood Mode $01 PIDs for the VQ37VHR
• Fuel system status for bank 1 and bank 2
• Calculated load
• Short/Long Fuel trims for bank 1 and bank 2
• Intake Manifold absolute pressure (MAP)
• Intake air temp (IAT)
• O2 Sensor lambda for bank 1 and bank 2
• Barometric pressure
• Absolute Load
• Accelerator Pedal position D&E
• Mass airflow for bank 1 and bank 2 (MAF A/B)

Please keep in mind, the typical values provided may be different than yours for many reasons like elevation, air temperature, and gasoline quality just to name a few.

If you would like to understand all the Mode $01 PIDs for the VQ37 please watch episode 18: Nissan & Infiniti 3.7 litre V6, All Engine sensors explained (below)

Please let me know in the comments below what you think of this video and if you would like to see something like this for a different engine.