Toyota Tundra: Common Codes & Fixes

Real-world diagnostic data for the Toyota Tundra. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.

13 codes have specific fixes for the Toyota Tundra
B2799 On Toyota trucks, B2799 is frequently caused by an aftermarket remote start system interfering with the immobilizer. 2006-2018 · moderate DIY · 1-3 hours C1651 C1651 brake fluid level warning on Toyota trucks is usually the float switch in the master cylinder reservoir cap. 2005-2013 · Easy DIY · 30 min P0018 Check the crankshaft position sensor and Bank 2 cam sensor connectors for oil contamination -- leaking rear cam plug drips onto the… 2005-2015 · moderate DIY · 1-2 hours P0037 Downstream (post-cat) O2 sensor on bank 1 heater resistance drops due to exhaust moisture corroding the heater filament. 2000-2015 · Easy DIY · 30-45 min P0050 Bank 2 sensor 1 is the upstream O2 sensor on the driver side of V6 Toyota engines. 2005-2018 · moderate DIY · 45 min - 1 hour P0056 Bank 2 sensor 2 is the downstream (post-cat) O2 sensor on the driver side. 2005-2018 · easy DIY · 30-45 min P0116 ECT performance fault — most often a stuck-open thermostat preventing the engine from reaching proper operating temp. 2005-2015 · Moderate DIY · 1-2 hr P0139 Slow response post-cat on Toyota — often a sign of impending cat failure. 2005-2014 · Easy DIY · 30-45 min P0150 Bank 2 sensor 1 air/fuel sensor malfunction — replace with Denso A/F sensor only. 2007-2014 · Easy DIY · 30-45 min P0160 Bank 2 sensor 2 inactive — replace with Denso OEM downstream O2. 2007-2014 · Easy DIY · 30 min P0330 Bank 2 knock sensor failure on the 1GR-FE V6. 2007-2017 · Moderate DIY · 3-4 hours P0430 Toyota truck catalytic converters last a long time but fail around 150-200K. 2007-2017 · moderate DIY · 2-3 hours P0449 The EVAP canister close valve (vent valve) on Toyota trucks gets clogged with dirt and debris from off-road driving. 2007-2017 · moderate DIY · 30-45 min

Frequently Asked Questions

What are the most common check engine light codes on a Toyota Tundra?

The most commonly reported OBD-II codes for the Toyota Tundra include B2799, C1651, P0018, P0037, P0050. Each code indicates a specific issue -- tap any code above for the full diagnostic breakdown.

How much does it cost to fix a check engine light on a Toyota Tundra?

Repair costs vary by code. Many Toyota Tundra fixes like gas cap replacement, sensor cleaning, or spark plug changes are under $50 in parts and can be done at home. More complex repairs like catalytic converter or transmission work can run $500-$2,000+ at a shop.

Can I drive my Toyota Tundra with the check engine light on?

It depends on the code. A steady check engine light usually means you can drive short distances safely. A flashing check engine light means stop driving immediately -- continued driving can cause serious engine damage. Scan the code first to know what you are dealing with.

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