TRAC OFF and VSC Light On a Toyota: What They Mean Together

TRAC OFF and VSC OFF lit at the same time is exactly what Toyota’s switch produces when it’s held down. The 2014 Corolla owner’s manual (pp.212–213) says that pressing and holding the VSC OFF switch for more than 3 seconds while the vehicle is stopped turns off both TRAC and VSC, and both indicators come on.

So start with whether anyone did that. If not, two other lights tell a setting from a fault: the slip indicator and the check engine light.

Two systems, one switch

The manuals treat TRAC and VSC as separate systems you can switch off separately. A quick press and release turns off TRAC alone, and only TRAC OFF lights; a second quick press turns it back on. Only the long press, with the vehicle stopped, takes VSC with it.

The 2014 Corolla manual’s reason for switching TRAC off at all is getting unstuck. In mud, dirt or snow, it explains, TRAC may cut engine power to the wheels, and with TRAC off the car may be easier to rock free. The same manual (p.214) is blunt about the limits: “do not turn the TRAC or VSC system off unless necessary.”

Some manuals describe the same push-and-hold with the vehicle stopped but give no number of seconds (2010, 2011 and 2013 Corolla, 2010 RAV4). On a 2012 Tacoma in 2WD, the long press is the only option, and it switches off Trailer Sway Control too (p.202).

Getting both lights to go out

Driving faster won’t do it. In the 2014 Corolla manual (p.213), a TRAC-only shutoff reverses itself as vehicle speed increases. Once TRAC and VSC have both been turned off, though, they don’t come back on with speed. What does work is the engine switch: turn it off (LOCK, or off) and both are re-enabled.

If both lights are still on after a restart and nobody has touched the switch, you’re past the switch. For that case, every Corolla, Tacoma and RAV4 manual we read from 2011 on has the same answer: TRAC can’t be operated, so contact a Toyota dealer. On a 2012 Tacoma, hill-start assist control and downhill assist control drop out with TRAC (p.204).

The slip indicator: flashing is normal, steady is not

Toyota’s manuals give the slip indicator two meanings. Flashing while you drive, it shows that VSC or TRAC is doing its work (2014 Corolla, p.493). Lit steadily, it’s reporting a malfunction in one of them. The 2011 Corolla manual (p.168) words it this way: “There is a malfunction in the TRAC and VSC systems.”

On a 2011-or-later Corolla, then, TRAC OFF and VSC OFF together with a steady slip indicator is a different situation from the two OFF lights alone. The two OFF lights alone fit the long press. Add a steady slip indicator and the car is reporting a malfunction.

2009–2010 Corolla: when VSC OFF flashes

The 2009–2010 Corolla works differently, going by the 2010 owner’s manual. VSC and TRAC were “if equipped”, and that manual has no TRAC OFF indicator anywhere. Switching TRAC off lights the slip indicator. Switching TRAC and VSC off lights the slip indicator plus VSC OFF.

The fault warning on those cars is VSC OFF flashing. In the manual’s words (p.165): “There is a malfunction in the TRAC and VSC systems. Contact your Toyota dealer.”

Owner complaints to NHTSA line up with that. Of the 17 complaints about 2009–2010 Corollas that mention the check engine light along with TRAC or VSC, seven describe the VSC light flashing (ODI 11217378, 11344125, 11320243, 10679873, 10560128, 10449580, 10544795). Three describe transmission or shifting trouble: one names a “SHIFT SOLENOID” (ODI 10679873), one a car stuck in third (ODI 10507207), and one says the “TRANSMISSION FAILED” (ODI 10347277). These are owners’ accounts, which NHTSA does not verify. The Corolla TRAC OFF page covers later years.

VSC, TRAC OFF and the check engine light all at once

Toyota’s owner’s manuals don’t explain why the lights come on as a group, and none of the Toyota bulletins we could search for the Corolla, Tacoma or RAV4 mentions VSC in its text. Owners and their mechanics have offered explanations, and they’re worth reading as exactly that.

A 2011 RAV4 owner wrote: “THE ENGINE LIGHT WILL CAUSE THE VEHICLE TO AUTOMATICALLY SHUT OFF THE 4WD AND STABILITY CONTROL” (ODI 11191478). That’s one owner’s observation, not a Toyota statement. A 2014 Tacoma owner relays what the dealer’s technician reported: “RODENTS ATE THE HOSE CONNECTING FUEL INJECTOR AIR PUMP TO VALVE WHICH TRIGGERS THE ECU TO FAULT AND CASCADES FAILURE TO STABILITY CONTROL” (ODI 10661583).

On the RAV4 the pairing often comes with a third light. Of the 86 RAV4 complaints that mention the check engine light with TRAC, VSC or a 4WD/AWD light, 63 come from the 2006–2012 generation, and 43 of those 63 also describe the 4WD/AWD (or LSD) light: three lights at once. Fourteen of the 63 name the charcoal canister or its filter hose.

One 2007 2WD RAV4 complaint reads: “FOUND THE EVAP SYSTEM CHARCOAL CANISTER FILTER HOSE BROKEN OFF AT THE FILTER ASSEMBLY. WATER HAD FILLED UP THE CHARCOAL CANISTER AS WELL AS GRAVEL AND SAND.” (ODI 10234899). NHTSA’s summary of Toyota bulletin TSB-0028-11 for the 2010 RAV4 says the charcoal canister “is updated to fix a malfunction light that is on with a stored trouble code.”

The 4WD light on those RAV4s carries its own message. The 2010 RAV4 manual says that when it comes on, it “Indicates a malfunction in the active torque control 4WD system” (p.420). When it flashes, “the driveline temperature is too high”, and the driver should reduce speed or stop, letting the engine idle until the light goes off (p.421). The RAV4 TRAC OFF page has the full picture, and the Tacoma TRAC OFF page covers the 2012 trucks behind 62 of the 90 Tacoma reports.

A flashing check engine light, and clearing it

Don’t mix up the slip indicator’s flashing with a flashing check engine light. California’s OBD II regulation (13 CCR §1968.2) requires the check engine light to blink once per second while a misfire at the level that damages the catalytic converter is occurring. It exempts vehicles that cut fuel during such a misfire, which may keep the light steady instead. The flashing check engine light page goes into it.

If a fault is stored, clearing the check engine light comes after the repair. Toyota’s 2023 Camry manual (p.533) has the owner check for a loose fuel cap and tighten it; the light then goes off after several driving trips. If it stays on, the manual says to contact a Toyota dealer as soon as possible. The reset guide covers the rest, and the TRAC OFF and check engine light overview explains what Toyota’s documents do and don’t say about the pairing. If TRAC OFF stays on after all that, see TRAC OFF light won’t turn off.