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### Descrição do Produto: Sensor de Relação Ar-Combustível Denso 234-9002
O Sensor de Relação Ar-Combustível Denso 234-9002 é um componente essencial para otimizar o desempenho do motor do seu veículo. Com uma construção robusta em material de zircônio, este sensor garante uma medição precisa da mistura de ar e combustível, resultando em uma eficiência de consumo de combustível superior. A precisão do Denso 234-9002 é inigualável, permitindo que o sistema de injeção do motor ajuste a mistura de forma ideal, o que não só melhora a performance, mas também reduz as emissões de poluentes.
A instalação do sensor Denso 234-9002 é simples e direta, tornando-o uma escolha prática para mecânicos e entusiastas automotivos. Com um design que facilita a integração com os sistemas existentes, você pode substituir o sensor antigo sem complicações. Além disso, a durabilidade do material utilizado na fabricação do sensor assegura que ele resista a condições adversas, prolongando sua vida útil e mantendo a eficiência do motor ao longo do tempo.
#### Instruções de Uso:
Para instalar o Sensor de Relação Ar-Combustível Denso 234-9002, siga os passos abaixo:
1. Desconecte a bateria do veículo para evitar qualquer curto-circuito.
2. Localize o sensor de ar-combustível no sistema de escape do veículo.
3. Remova o sensor antigo, desconectando os fios e soltando os parafusos de fixação.
4. Instale o novo sensor Denso 234-9002, garantindo que esteja bem fixo e os conectores estejam firmemente conectados.
5. Reconecte a bateria e ligue o veículo para verificar se o sensor está funcionando corretamente.
#### Características do Produto:
– Material: Zircônio, que proporciona alta resistência térmica e química.
– Precisão: Medições altamente precisas da relação ar-combustível, otimizando a eficiência do motor.
– Instalação: Design que permite uma instalação fácil e rápida, compatível com diversos modelos de veículos.
– Durabilidade: Construído com materiais de alta qualidade, garantindo resistência a condições extremas e prolongando a vida útil do sensor.
### Perguntas Frequentes (FAQ)
Pergunta: O Sensor Denso 234-9002 é compatível com meu veículo?
Resposta: O Denso 234-9002 é compatível com uma ampla gama de veículos. Consulte o manual do proprietário ou um especialista para verificar a compatibilidade específica.
Pergunta: Como posso saber se meu sensor de ar-combustível está com defeito?
Resposta: Sinais de um sensor defeituoso incluem aumento no consumo de combustível, falhas no motor e luz de verificação do motor acesa. Um diagnóstico adequado pode confirmar a necessidade de substituição.
Pergunta: Qual é a vida útil esperada do Sensor Denso 234-9002?
Resposta: Com a instalação correta e manutenção adequada, o sensor pode durar entre 60.000 a 100.000 km, dependendo das condições de uso do veículo.
Pergunta: Posso instalar o sensor eu mesmo?
Resposta: Sim, a instalação é simples e pode ser feita por quem possui conhecimentos básicos de mecânica. Siga as instruções de uso para garantir uma instalação correta.
Pergunta: O que fazer se o sensor não funcionar após a instalação?
Resposta: Verifique se todas as conexões estão firmes e se o sensor está corretamente instalado. Se o problema persistir, consulte um mecânico para um diagnóstico mais aprofundado.
Joel Mondl –
Perfect fit, worked great, easy installation. 2004 Toyota Tacoma, 2.4 liter single cab, automatic transmission.
TractorMan92 –
Working on a stubborn check engine light issue. The error code indicated a bad heater circuit on the Air/Fuel ratio sensor (Bank 1, sensor 1) on a 2002 4Runner (3.4L V6). Checked the heater circuit and it was reading approx 20 ohms resistance. Without a reference I was calling it good (was an open circuit) but an online video cited the spec at 1.3-1.6 ohms on a good heater circuit (the two black wires).
Bit the bullet after shopping around. A couple sellers have a ’10 yr warranty’ but they are hard to work with. Installed easily (two bolt installation before the catalyst under the pass side floor.). I did check the heater circuit resistance by poking two small holes in the plastic bag. 1.4 ohms. Viola’ !!!!
Cleared the code and the short term and long term fuel trims came back into spec. Nice part and it works. Given the cost, be sure to verify its needed. A local shop wants over $150 for ‘diagnostics’ (a license to steal!) They just check the codes and pronounce “You need a new Air / Fuel ratio sensor!” and want to charge you $350-500 to install one. Buy this quality part and do it yourself in 15 minutes. Then take your better half out for dinner with the savings!
Amazon Customer –
Ordered wrong device and returned this product and reordered the proper one with the help from Denso customer help , Thank You Amazon & Denso. Nice to be able to use OEM quality parts at a reasonable price that fits the requirements. Also Denso delivered promptly and the customer Help department was top notch, nice to deal with knowledgeable and friendly people. I highly recommend this supplier.
Jim D –
I own a 2003 Toyota Tacoma 2WD EXT cab with an automatic transmission and 2.4 liter 4-cylinder engine. The vehicle has 65,000 miles.
I recently got a CHECK ENGINE amber light. I attached my OBDII Diagnostic Reader/Scanner device which I purchased on Amazon a few years ago and discovered a P0135 code. This indicates a fault in the Air Fuel Sensor (aka, O2 Sensor…used interchangeably), Bank 1, Sensor 1, and more specifically, a fault in the forward Air Fuel Sensor Heater Circuit. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code.
There are two O2 sensors on my Tacoma (four on some of the Toyota V8’s), one located immediately before the catalytic convertor and one immediately behind it. “Bank 1” is the forward of the two O2 sensors. The Sensor internal heater circuit is NOT repairable, so unless you have a short in your wiring leading to the sensor, a replacement O2 Sensor is in order if you’ve received the P0135 OBDII diagnostic code.
Denso is the OEM manufacturer for the Toyota Air Fuel sensors. They are built EXACTLY to Toyota specs. The Toyota ECU is looking for VERY SPECIFIC DATA from these sensors. While some of the after market Chinese air fuel sensors offered on Amazon are less expensive, they may not meet specific Toyota ECU specs and will trip a CHECK ENGINE amber light regardless of their age. Accordingly, I recommend the Denso OEM Air Fuel Sensors to avoid any of these issues. When ordering the Denso Air Fuel Sensor on Amazon make absolutely sure you list ALL your vehicle details…model year, specific model type, specific engine size, manual or automatic transmission, etc. as the sensors vary in design based upon each of the preceding. You can check the Denso web site to cross reference what Amazon is showing as the correct part for additional peace of mind.
Removing the old part and installing the new one doesn’t require a great deal of mechanical expertise. Your Toyota dealer will quote $350-$400 for parts and labor to complete the job. You can do it for the cost of the Denso OEM part on Amazon and your willingness to climb under your truck.
The tools recommended for the job are:
1. 12mm socket
2. 12mm open end wrench
3. 10mm socket
4. 10mm open end wrench
5. socket wrench
6. small flat head screwdriver
7. diagonal cutters
8. Zip-tie
9. Heat resistant anti-seize compound
Toyota is notorious for their positive-locking electric connections, and this part is no exception. The electrical connector has a tiny locking tab located on the side of the connector which must be released to separate the male and female ends. More on that later.
Here’s what I recommend to complete the process:
1. Remove the electrical connector metal support bracket to allow easy access to the electrical connection. Use diagonal cutters to cut any retaining parts for the electrical cable. Use a 10mm socket and/or 10mm open end wrench to do this. It’s tight quarters…very tedious…one click at a time. BUT…it’s the only way you can truly obtain access/purchase to remove the electrical connection. This is the “easy” part…reattaching the bracket later is THE most difficult part of this entire job.
2. Remove the old O2 sensor from the exhaust pipe. I used both an open end 12mm wrench and 12mm socket. If the bolts are rusted use your favorite penetrating oil. I applied this a day before I did the job.
3. Separate the electrical connection. ****Here’s the trick to removing an infamous Toyota electrical connection: use a small flat head screwdriver to drive under the plastic locking clamp on the SHORTER SIDE of the electrical connector to move it up and off the plastic locking tab.**** If you do this you can easily pull the connector apart using you fingers.
4. Install the new Air Fuel sensor. I began with the electrical connector. Push the male sensor connector on to the female connector attached to your vehicle. There are two ribs on the side of the connector to ensure you get this aligned correctly. You’ll hear a “snap” as the parts mate and the locking tab secures the two parts.
5. Coat the 12mm studs with anti-seize compound. Place the NEW gasket on the fitting…DO NOT re-use an old gasket. Denso includes a new gasket with each sensor part. Using caution not to get anti-seize compound on the new sensor, slide it over the studs. Hand tighten the 12mm nuts. Then ALTERNATE tightening each nut in SMALL INCREMENTS until you’ve reached the magical 14 foot-pounds of torque recommended in the Toyota shop manual. If you have any doubt regarding the cleanliness of the sensor…clean it with isopropyl alcohol before installation.
6. Now the HARD PART: reinstalling the electrical connection supporting bracket. This will be a tedious process. I initially aligned the bolt on the bracket and after MULTIPLE ATTEMPTS…finally got the bolt started. I hand-tightened it from there…and then used the 10mm socket. This process will test your patience…but you’ll eventually get it. Just think of the several hundred bucks you’ve saved to keep your sense of humor.
7. Install a zip-tie to secure the O2 sensor electrical lead to one of the metal automatic transmissions lines…or whatever your vehicle originally had in place to secure the lead.
8. Reset your OBDII to eliminate the P0135 code.
9. Drive your truck long enough to allow it to become fully heated to normal operating temperature. The Toyota ECU expects to see the Air Fuel Sensor electrically heated to a pre-determined temperature in a specified period of time after start, or it will send a P0135 code. If your vehicle is fully warmed up…and you don’t get a CHECK ENGINE amber light…congratulations…you fixed the problem! I always turn off the engine and ignition and re-start a few times just to be sure.
10. Politely apologize to your neighbors for any profanity they might’ve overheard during you many attempts to re-attach the electrical connection support bracket.
I’ve attached photos of the major aspects of the installation process. Good luck!
Amazon Customer –
Replaced this sensor on my 2001 4RUNNER, all the lights abated… so far so good.
Denny –
Toyota vehicles are engineered around these Denso parts, a cheap knockoff MAY solve the issue for a while, but as the sensor gets dirty/degrades, these Denso ones will keep trucking. You’re gonna replace it around 100-200k kilometers, buy a replacement that will set you up for that many again. So simple. That’s where the Toyota reputation for reliability comes from
A.B –
Just get it, it’s cheaper than the box auto stores and works great! Bolted right in, cleared the code, on day 7 with no CEL back on. 2004 Tacoma 2.4L.
Amazon Customer –
Fixed my issue, great product. All pieces were shipped, installed easily and solved check engine light without having to use code reader
James Walker –
It was the most expensive part of the choices I had BUT it was the right part for the job that fixed the problem….
Jim D –
I purchased an 02 sensor from another vendor & ordered it for a 4×4 model by mistake. Sent it back & looked to Amazon for a quick solution since I’d already removed the failed sensor in my ’02 Toyota 4Runner SR-5 RWD. Amazon’s selection of quality Denso parts got me back on the road within 2 days. No more “Check Engine” light, no more FAULT codes. Immediate results. So far, so good. Easy to install, & saved about $120 on the part too. Highly recommended by this DIY Chick : ) Thanks!