Symptoms
Warning lights and what they mean — TRAC OFF, flashing light, and per-model causes.
Blinking Check Engine Light on a Toyota: What to Do
An active engine misfire — raw fuel is reaching the exhaust
Toyota Camry Check Engine Light: Causes, Codes, Reset & Fixes
A stored engine fault. Complaints cluster on 2018–2020 cars and oil-burning 2007–2009 cars
Toyota Check Engine Light: Causes, Codes & What to Do
Toyota calls it the malfunction indicator lamp: a malfunction in the engine control, throttle control, transmission or emission control system, or the hybrid system on hybrids. The list varies by model and year
Toyota Corolla Check Engine Light: Causes, Codes & Fixes
A stored engine fault. On 2005–2008 Corollas, rule out ECM recall 10V-384 before anything else
Toyota Highlander Check Engine Light: Common Causes, Codes & Fixes
A stored fault. 2017–2018: Toyota's transmission program ZJC lists it. 2006–2010 Hybrid: inverter recalls
Toyota Prius Check Engine Light: Common Causes & Solutions
An engine, emission, throttle or hybrid-system fault. 2010–2015 Prius and 2012–2017 Prius v: ask about inverter programs 23TE02/23TE03
Toyota RAV4 Check Engine Light: Causes, Codes & Fixes
A stored engine fault. 2001–2003: Toyota tied shift codes to the ECM. 2019–2021: ask about program 24TE04
Toyota Sienna Check Engine Light: Common Causes, Codes & Fixes
A stored fault code, often with VSC and TRAC OFF. On certain 2017–2018 vans, a ZJC transmission symptom
Toyota Tacoma Check Engine Light: Common Causes, Codes & Fixes
A fault in the emission, engine, throttle or automatic transmission controls (2016 manual). Toyota bulletins tie certain codes to certain years
Toyota TRAC OFF Light Won't Turn Off: How to Clear It
Either TRAC and VSC were switched off and haven't been re-enabled, or TRAC can't operate, which Toyota's manuals send to a dealer
Toyota Tundra Check Engine Light: Common Causes, Codes & Fixes
A malfunction in the engine control, throttle control or emission control system (2022 and 2026 manuals). The 2008 to 2018 manuals also list the automatic transmission
TRAC OFF and Check Engine Light on a Toyota Corolla: Causes & Fixes
Traction control (TRAC) is off. If the switch wasn't pressed, the 2014 Corolla manual says TRAC can't operate: contact a Toyota dealer
TRAC OFF and Check Engine Light on a Toyota RAV4: Causes & Fixes
Traction control is off or can't operate. On 2006–2012 RAV4s, owners often report it with the check engine and 4WD lights; Toyota doesn't say why
TRAC OFF and Check Engine Light on a Toyota Tacoma: Causes & Fixes
TRAC OFF lit without the switch means TRAC can't operate (2012, 2015 and 2018 manuals). On 2012 trucks, owners mostly trace it to secondary air injection
TRAC OFF and Check Engine Light on a Toyota: Codes, Causes, and Reset
Traction control (TRAC) is off. If nobody pressed the switch, Toyota's manuals say TRAC cannot be operated and to contact a dealer
TRAC OFF and VSC Light On a Toyota: What They Mean Together
TRAC and VSC are both off. Holding the VSC OFF switch for over 3 seconds while stopped does exactly this (2014 Corolla manual)