P1155 Toyota RAV4 Error Codes – (Troubleshooting Guide)

P1155 Toyota RAV4 Error CodesP1155 Toyota RAV4 Error. CodesThe last thing any owner of an RAV4 wants to deal with is the check engine light. Indicator lights indicate to you that some problems have occurred with your SUV that must be solved.

Some errors are minor, and some of them are very serious. So exactly what does the P1155 Toyota RAV4 error code mean? We currently have some reasons why you have a P1155 error on your vehicle.

P1155 Toyota RAV4 Error Codes What Does This Error Mean?

P1155 Toyota RAV4 Error Codes. The RAV4 has some sensors that examine the air and mix fuel in the engine. However, the P1155 specifically indicates the problem with the air/fuel ratio sensor.

The P1155 code means Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1.

The air/fuel ratio works properly under warm conditions. If you warm up your car properly, it can work properly because it has a little heater inside. Once its temperature is warm enough, the sensor can send the right signals.

If you can’t warm up your car enough, the sensors will not send the signal properly. If a P1155 error code appears, ECM will determine there is something wrong. The P1155 pops up because the factory specification and current reading do not match.

Potential Causes

The P1155 code error isn’t the same for all cars. Multiple car makers may be used for other issues. If you are
Solution-aware internet articles may not apply to Toyota cars unless they specifically talk about them.

• Open or shorten the air/fuel sensor in the bank 2 sensor. 1
• Faulty A/F sensor in bank 2 sensor 1
• Faulty electrical connection to the A/F sensor in bank 2, sensor 1
• Less likely, but possible: Faulty Engine Control Module (ECM)

How to Resolve

If you really want to fix your own car by yourself, then I can suggest some steps to determine what’s the problem and how you can resolve it. In any case, if you find an air or fuel sensor on Bank 2 (where it depends on your model), here are some things you must see.

• Look carefully if any wire has damaged or broken parts, like pins.
• Check carefully the connection going to the sensor and coming from the sensor.

By any chance, you could replace the sensor all by yourself. If the wire is perfectly fine, then you go for the sensor and replace it.

If you are ready for repairs and don’t know how to do them, consider purchasing a repair manual. These are very helpful and give you the perfect diagrams and proper steps for the most common repairs and maintenance.

On the other hand, you have doubts and are not ready to repair them yourself. There is no need to go to a Toyota technician; you can go to a professional mechanic.

In any case, the sensor is replaced, but the engine lights keep coming back. There will be a problem with ECM. It happens rarely. In any case, you should go for a professional Toyota technician.

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Is It Safe to Drive?

There is a possibility your RAV4 won’t start with this error code. Then you must repair it before driving.
In any case, your SUV does start, but it’s not working properly. It’s a little bit shaky.

Problems like taking more fuel, and rough idling, I suggest it’s not safe to keep driving. it may lead to more damage to your vehicle.
Even if you don’t detect other problems, we suggest you fix them as soon as possible because misbehavior will cause you some hidden damage.

And on the other hand, if the check engine light is on, you have no idea there is something more serious happening.
If you properly maintain your RAV4, it will continuously serve you for many miles.

Estimated Repair Cost

It depends on where you are taking your RAV4; there is a different cost and what has to be done first. First, detecting the problem (troubleshooting) can cost around $75 to $175. It takes a maximum of one hour to figure out what the issue is.

It depends on you if you are ready to replace the sensor all by yourself. Advance Auto Parts sells them starting at $172.99. Look for another place; maybe you will find it cheaper.

If you choose to have your sensor replaced by a professional like a Toyota dealership, it will cost you more and another hour of labor.

By any chance, if your ECM is bad, you may spend between $995 and $1,065 to have it changed. The labor on this job averages $77 to $97, while the parts may cost $918 to $968.

Expert Tip for Dealing with Engine Codes

If you really are ready to fix your car all by yourself, I recommend you purchase a code scanner. Then there is no need to take your vehicle to a mechanic. You will figure out at home what’s the issue with your RAV4 with the help of these tools.

However, not everyone needs to use these tools (code scanners). Or take your vehicle to a mechanic right away. There are some auto parts stores that will read the code free of charge. AutoZone, O’Reilly, and Advance Auto Parts all offer this free service.

The staff there will read the code as well; they will tell you how to fix it up for yourself, saving you money and time.
Continuously check that the engine light stays on; it means your RAV4 has a P1155 code error.

But in any case, if your light is blinking, that is a whole other issue, and it’s a very serious problem. You should immediately go to a safe spot and stop the vehicle. And fix that error quickly.

No need to panic.

Once you have full knowledge about the check engine light P1155 code error, You have full information; you need to know what the causes of that error are and how we fix it. If we do it at home or by taking a vehicle to a mechanic

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