Skip to content
Skip to content

OBD-II Code

C0235

Severity

Not yet reviewed

Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.

Can you drive it

We cannot say

Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.

Indicative cost (USD)

$40–$650

From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.

C0235 is a fault in the vehicle speed sensor (VSS) circuit — the EBCM or transmission control module is not seeing a valid output-shaft or transfer-case speed signal during vehicle motion, or the signal is implausible compared to the four wheel-speed sensors.

How a shop works this

Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.

  1. Note every code that is set, not just this one.

    Codes that appear together usually narrow the cause faster than any one of them read alone.

  2. Read the freeze frame — the conditions the fault was recorded under.

    Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.

  3. Confirm the fault is current rather than history.

    Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.

  4. Then follow the diagnostic notes further down this page, in the order they are written.

    They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.

If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.

Common symptoms

  • Check engine light
Read the full diagnostic procedureC0235 is a fault in the vehicle speed sensor (VSS) circuit — the EBCM or transmission control module is not seeing a valid output-shaft or transfer-c…

C0235 is a fault in the vehicle speed sensor (VSS) circuit — the EBCM or transmission control module is not seeing a valid output-shaft or transfer-case speed signal during vehicle motion, or the signal is implausible compared to the four wheel-speed sensors. On older vehicles the VSS is a transmission-tailshaft or transfer-case-mounted Hall sensor or variable-reluctance pickup; on newer vehicles the 'VSS' is derived from the wheel-speed sensors over the chassis bus, so C0235 on a newer car often points at a network/bus issue or a sensor-fusion mismatch rather than a single sensor.

Cheapest-first ladder

  1. Determine which sensor is the actual VSS on the platform you're working on — on Toyota T100/Tacoma/4Runner and most Mopar/GM trucks of the 1990s-2000s the VSS is a discrete sensor mounted on the transfer case or transmission tailshaft and can be ohm-checked (passive VSS: 800-1,800 ohms typical) or scope-checked for a 0-200 Hz AC waveform whose frequency tracks vehicle speed.
  2. Live-data the VSS during a road test alongside the wheel-speed sensors — a healthy VSS tracks within 1-2 mph of the average wheel speed; a flat-lined VSS while wheel sensors read correctly is a discrete VSS failure or wiring issue.
  3. Inspect the sensor mounting boss on the transfer case or transmission — these threaded ports collect debris and the sensor face gets coated with metallic shavings from the output-shaft drive gear, attenuating the signal.
  4. Wiggle-test the VSS connector and the harness routing along the transmission for chafe and heat damage. Expensive-misdiagnosis caveat: on Mopar 545RFE/68RFE transmissions, the 'VSS' is actually the output-speed sensor inside the transmission and a 'failed VSS' often points at deeper transmission internal damage (worn speed-sensor tone ring on the output shaft) rather than an external sensor — pulling and inspecting the OSS before quoting a transmission overhaul is the cheap check.
Vehicle-specific patterns1995-2004 Toyota T100/Tacoma/4Runner/Tundra (early) with transfer-case-mounted VSS commonly throw C0235 from sensor-face contamination — pull, wipe c…
  • 1995-2004Toyota T100/Tacoma/4Runner/Tundra (early) with transfer-case-mounted VSS commonly throw C0235 from sensor-face contamination — pull, wipe clean, reinstall, code clears, no part needed.
  • 2003-2010Dodge Ram/Durango with the 545RFE 5-speed automatic throws C0235 from a failed output-speed sensor; the OSS is a $35 part but requires dropping the transmission pan and removing the valve body to access on some model years.
  • 1999-2007GM trucks with the 4L60E/4L80E throw C0235 from a tailshaft-mounted VSS that's exposed to driveline rust on the connector pins.
  • 2005-2014Ford F-250/F-350 with the 5R110W TorqShift throws C0235 from output-shaft speed sensor failure inside the transmission, often coincident with a 'no shift' complaint.

Estimated repair$40 to $650.

Look up another code

More free tools

VIN DecoderDecode year, make, model, engine, recalls.Maintenance ScheduleOil, timing belt, fluids, by vehicle.Tire SizeOEM vs new — diameter delta + speedo error.Gas CostWeekly, monthly, annual fuel math.

See all 9 tools