Automotive Oxygen Sensor Knowledge

The Complete Guide to EGT Sensors: Symptoms of Failure, P0544 Codes & Replacement Cost
Is your DPF warning light on or your car stuck in Limp Mode? You might be dealing with a faulty Exhaust Gas Temperature (EGT) Sensor. Common on diesel engines like the 1.5 dCi, a bad EGT sensor triggers codes like P0544 and P2033. In this ultimate guide, we explain what these sensors do, the symptoms of failure, and how much you can save by replacing them yourself. Read more...
Fixing P0335 Crankshaft Position Sensor Circuit Error on Hyundai i30 / Kia Ceed (Complete DIY Guide)
Is your Hyundai i30 or Kia Ceed cutting out while driving or failing to start? The P0335 error code is a common culprit on the 1.6 CRDi and Gamma engines. It indicates a failure in the Crankshaft Position Sensor—a small part that controls your engine's timing. In this comprehensive guide, we explain the symptoms, why it happens, and show you how to save $200+ by fixing it yourself in under 30 minutes. Read more...
Keep Your Legend Alive: Essential O2 Sensor Maintenance for 1996-2000 Jeep Cherokee & Wrangler
Keep your legendary 1996-2000 Jeep Cherokee or Wrangler running smoothly by maintaining its O2 sensors. Learn how replacing faulty sensors can save you money and enhance performance. Read more...
Failed Smog Test? How to Replace Oxygen Sensors on Toyota Sequoia / Lexus LX470 (4.7L V8 Guide)
If your Toyota Sequoia or Lexus LX470 failed the smog test, faulty oxygen sensors might be to blame. Learn how to replace them easily and get back on the road with better emissions and performance. Read more...
Toyota Tundra V8 O2 Sensor Replacement: Why You Should Change All 4 Sensors At Once (And Save Money)
Are you driving a Toyota Tundra V8 and noticing poor fuel efficiency or engine issues? Replacing all 4 oxygen sensors at once can help save money and restore your truck’s performance. Read more...
Why Your 2014 Honda CR-V is Losing Gas Mileage: Upstream vs Downstream Oxygen Sensor Replacement Guide
Experiencing poor gas mileage in your 2014 Honda CR-V? It could be a faulty oxygen sensor. Learn the difference between upstream and downstream sensors and how replacing them can boost your fuel economy. Read more...
How to Fix Honda Civic 1.8L Check Engine Light P0134 / P0135 (DIY Guide)
Struggling with a P0134 or P0135 code on your Honda Civic 1.8L? You don’t need a mechanic to fix it! Learn how replacing your upstream O2 sensors can restore performance and save you money. Read more...
Subaru Forester Hesitation on Acceleration? Replace the Front O2 Sensor to Fix It
If your Subaru Forester hesitates when you hit the gas, the front O2 sensor is often the culprit. Here’s how to diagnose it, fix it, and save over $200 with Automotive Leader. Read more...
Why Your Honda CR-V Failed Smog Test? Check the Upstream Oxygen Sensor
Did your Honda CR-V fail its smog or emissions test? The upstream oxygen sensor is one of the most common hidden causes. Here’s how to diagnose it, fix it, and save over $200 with Automotive Leader. Read more...
Solving the Honda Accord P0134 Code (O2 Sensor No Activity): A DIY Repair Guide
Got a P0134 code on your Honda Accord? That “No Activity” O2 sensor issue is easier and cheaper to fix than most people think. Here’s the DIY guide — and how to save over $200 versus dealership pricing with Automotive Leader. Read more...
Denso vs. Aftermarket: Choosing the Right Oxygen Sensor for Your Toyota RAV4 (Save 40%)
Trying to choose between a Denso oxygen sensor and an aftermarket one for your Toyota RAV4? Here’s the cost breakdown, performance difference, and the best way to save 40% while keeping OEM-level reliability. Read more...
2012–2017 Toyota Camry Poor Gas Mileage? It Might Be Your Air Fuel Ratio Sensor
Is your 2012–2017 Toyota Camry burning more fuel than it should? A failing air fuel ratio sensor is one of the most common causes. Learn how to diagnose and fix it affordably with OEM-quality parts from Automotive Leader. Read more...

Automotive Oxygen Sensor Knowledge

The Ultimate Guide to Honda Civic Oxygen Sensors (Generations 8, 9 & 10)

Dealing with a Check Engine Light on your Honda Civic? Confused about "Upstream" vs "Downstream"? Our ultimate guide covers sensor locations, common fault codes, and the correct replacement parts for...

OEM vs Aftermarket Oxygen Sensors: The Honest Truth (2025 Guide)

Are expensive OEM sensors worth it? Or can a $50 aftermarket sensor do the job? Discover the truth about aftermarket alternatives and how to choose the best O2 sensor for...

Denso 234-4011 Oxygen Sensor Compatibility Guide: Does it Fit Your Honda or Acura?

Searching for the Denso 234-4011 Oxygen Sensor? You've found the most popular replacement part for late 90s and early 2000s Honda and Acura models. In this guide, we provide a...

The Complete Guide to EGT Sensors: Symptoms of Failure, P0544 Codes & Replacement Cost

Is your DPF warning light on or your car stuck in Limp Mode? You might be dealing with a faulty Exhaust Gas Temperature (EGT) Sensor. Common on diesel engines like...

Fixing P0335 Crankshaft Position Sensor Circuit Error on Hyundai i30 / Kia Ceed (Complete DIY Guide)

Is your Hyundai i30 or Kia Ceed cutting out while driving or failing to start? The P0335 error code is a common culprit on the 1.6 CRDi and Gamma engines....

Keep Your Legend Alive: Essential O2 Sensor Maintenance for 1996-2000 Jeep Cherokee & Wrangler

Keep your legendary 1996-2000 Jeep Cherokee or Wrangler running smoothly by maintaining its O2 sensors. Learn how replacing faulty sensors can save you money and enhance performance.

Failed Smog Test? How to Replace Oxygen Sensors on Toyota Sequoia / Lexus LX470 (4.7L V8 Guide)

If your Toyota Sequoia or Lexus LX470 failed the smog test, faulty oxygen sensors might be to blame. Learn how to replace them easily and get back on the road...

Toyota Tundra V8 O2 Sensor Replacement: Why You Should Change All 4 Sensors At Once (And Save Money)

Are you driving a Toyota Tundra V8 and noticing poor fuel efficiency or engine issues? Replacing all 4 oxygen sensors at once can help save money and restore your truck’s...

Why Your 2014 Honda CR-V is Losing Gas Mileage: Upstream vs Downstream Oxygen Sensor Replacement Guide

Experiencing poor gas mileage in your 2014 Honda CR-V? It could be a faulty oxygen sensor. Learn the difference between upstream and downstream sensors and how replacing them can boost...

The Ultimate Guide to Honda Civic Oxygen Sensors (Generations 8, 9 & 10)

Dealing with a Check Engine Light on your Honda Civic? Confused about "Upstream" vs "Downstream"? Our ultimate guide covers sensor locations, common fault codes, and the correct replacement parts for...