Dash V2.34.0 Release

Nexus Information › Firmware ReleasesUpdated Sep 2026

Dash firmware V2.34.0 is mostly a housekeeping release, but it fills in several Haltech CAN channels that dashes couldn't show before and fixes a handful of third-party ECU quirks. Here's our summary of what changed and who should update.

Before you update

V2.34.0 needs NSP 1.46.3 or newer. Update NSP on your laptop first, then load the dash firmware. If NSP's updater isn't offering new versions, check your computer against our note on NSP updater TLS requirements.

New feature

  • Every dash now has an Oil Over Temperature channel, so you can build an oil temperature warning straight from it.

Haltech CAN: more channels, better scaling

If your dash reads from a Haltech ECU, these are the changes you'll notice:

  • Oil Level and Clutch Pressure can now be displayed.
  • The four Nitrous Enable output states (1 to 4) are now available, along with NOS Bottle Opener State and Exhaust Cutout State.
  • Turbo Speed 1 and 2 now show the correct values, after a scaling error was fixed.
  • Specific Humidity scaling is corrected too.

Third-party ECUs and OBD-II

  • With an ECUMaster ECU, the gear readout is now right.
  • On OBD-II, Ambient Air Temperature reads correctly, and channels the car doesn't support are handled more gracefully.

Running a non-Haltech ECU? See OBD-II channels supported by Haltech dashes and sourcing data for dashes in NSP.

Display and NSP fixes

AreaWhat changed
TablesOn an axis set to Discrete Centered with consecutive whole-number values, lookups no longer round to the wrong cell
Battery light outputIts channel state now reads On or Off
PWM-capable outputs used as switched outputsOnly the pin state is shown now
Transmission oil temperature switchIts input state now reads Ok or Over Temp
On-board loggingYou now get a warning if a logging group has channels in it but is switched off
Fuel level sensorThe Input Type setting is no longer ignored
Error statesThe dash shows an error message rather than a huge negative number
NSP navigation treeExternal devices that are connected but not enabled in the Haltech CAN System menu no longer flicker
Peak ValuesNow found under Functions, with its own enable setting for the input
Device timeoutDash to ECU timeout messages are fixed
Haltech CAN SystemChoosing it now turns on Enable External IO Control by default

Should you update?

If you use any of the newly supported channels, run an ECUMaster ECU, rely on OBD-II data, or have seen odd turbo speed readings, yes. Otherwise it's a sensible update to do next time the car is plugged in. Save a copy of your dash layout before you flash anything. For how the dash and ECU share inputs and outputs, see IO between dash and ECU in NSP, and for ECU firmware changes, check the Nexus ECU release notes, such as V1.34.3.