Tire pressure light

SZALKUSKT

MEMBER
2011 SCION XD
4 CYL
2WD
AUTOMATIC
102,000 MILES

I have the tire pressure light flashing. Assuming I have 4 good sensors, is there something I can do to reset the car's computer to the pressure sensors? I am just looking for simple things I can do to reset the flashing light and see if that fixes the problem before I have to take tires off the rims etc.2001 Scion XB with TRD rims. I recently bought the car and it wasn't flashing when I bought it and prior to selling it the seller changed the two front tires.I'm sorry but my car is actually an XB not an XD.

Sunday, January 12th, 2020 AT 10:33 AM

15 Replies

KASEKENNY

MECHANIC
18,907 POSTS

The fact that the light is blinking means there is a system issue. Unfortunately just resetting the module will more than likely not resolve this. We need to start with what codes are in the system and go from there. I attached a lot of info about this system including diagnostic steps to figure this out. More than likely the light is blinking in a pattern which has a meaning but just scanning the system with a scan tool will result in the codes needed to figure this one out.

Let me know what codes we have and we can go from there. Thanks

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Sunday, January 12th, 2020 AT 3:18 PM

SZALKUSKT

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274 POSTS

I have an OBD2 code scan tool and I am getting an "ERR" message. My scan tool works on other cars but for some reason I am getting an ERR message on this car. I am not sure why. Is this car OBD2? 2011 Scion XB.

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Tuesday, January 21st, 2020 AT 6:21 AM

KASEKENNY

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Yes. This is an OBD II car. All cars since the mid 1990's are OBD 2.

As for the error message, check with the manufacturer of the scan tool because that normally has a specific meaning but it varies on tool. Usually it means there is a communication issue with the ECM but let's double check that because if we chase that and its not what it means for this tool then we will just waste time.

If it is then we need to trace the wires from the DLC to the ECM. I would just ohm them out from end to end and see what they are. If you have an open on the pink or grey wire then that is the issue.

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Wednesday, January 22nd, 2020 AT 7:08 PM

SZALKUSKT

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I purchased a new OBD II scanner and there are no DTC codes showing on the OBD II scanner. Do I need to jumper terminals 13 and 4 on the DLC3 to check for flashing codes? I don't have the SST tool. Will a jumper wire work?
Would something like this tool help?

Autel MaxiTPMS TS401

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Tuesday, December 28th, 2021 AT 7:57 PM

KASEKENNY

MECHANIC
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So, if you have no codes and another scan tool can communicate then we know there are no issues with the vehicle.

This means if the tire light is still flashing then there is an issue with the system that we are going to have to work through.

It appears just a jumper wire will work. I don't see any specific resistors in this one, so you need to jump them and check the codes we get.

I attached all the info below on this.

Please run through it and let us know what you find. Thanks

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Wednesday, December 29th, 2021 AT 3:05 PM

SZALKUSKT

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274 POSTS

Actually, the light flashes only after you start the vehicle for a short period of time and then it remains on steady. With that said, does that change the situation about how to troubleshoot?

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Friday, December 31st, 2021 AT 5:25 PM

KASEKENNY

MECHANIC
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Sorry I was not clear. It does not. If the light is on or staying steadily on, then that still means there is an issue with the system that needs to be run through to figure out what the issue is.

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Saturday, January 1st, 2022 AT 3:57 PM

SZALKUSKT

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274 POSTS

Okay, thanks for the continuous help with this issue as it has been taking a long time for me to get after it. I finally have the car being unused and I have free time. Also, I finally got a new OBDII tester!

Anyway, I ran through the procedure with the two pins (13 and 4) on the OBDII jumped together. I retrieved two codes: 21 and 24. I counted two flashes, then one flash, then two flashes and four flashes. Then it repeated itself. Therefore, I feel confident that I saw code 21 and code 24. I look forward to knowing what these two codes represent for the TPMS. My car is a 2011 XB just so we are on the same page. In the first post I mentioned XD, but this car is an XB, 2011 model year.

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Saturday, January 1st, 2022 AT 8:41 PM

KASEKENNY

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Okay. That is great. I am attaching the info on the 21 code. Basically, they are telling you the same thing except for different tires. This is telling you that the module is not getting a signal from transmitter 1 and 4.

Normally this is due to the transmitter itself in the tire, but it is worth going through the testing because if this light just came on then it is highly unlikely that you would have 2 sensors fail at the same time.

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Sunday, January 2nd, 2022 AT 11:01 AM

SZALKUSKT

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Okay, Thanks. If the other two transmitters were not sending a signal then I probably would have a code 22 or 23 as well? The warning light has been on for well over 3 years and I feel that a replacement of all 4 tire pressure transmitters should do the trick. I am planning to buy an Autel Maxitpms TS508 and their Autel MX-Sensors to fix the issue. Your thoughts?

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Sunday, January 2nd, 2022 AT 1:05 PM

KASEKENNY

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I don't have experience with those sensors, but it looks like they have good reviews.

However, that makes perfect sense then. Clearly one failed and then the other so I would do exactly the same thing.

Thanks for clarifying that.

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Sunday, January 2nd, 2022 AT 1:42 PM

SZALKUSKT

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Okay, I will let you know the results. I've been planning to change all four tires and this would be a great time to address the TPMS. The tire change is also part of the reason why I haven't addressed the TPMS in so long. Which tires do 1, 2, 3, and 4 correspond to? Code 21, 22, 23, and 24 is assumed? LF RF etc. Which tires do the codes correspond to?

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Sunday, January 2nd, 2022 AT 3:07 PM

KASEKENNY

MECHANIC
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Correct. The last digit is the tire location, and it always starts on the driver side front, passenger side front, driver rear, passenger rear.

Totally understand. It would be great if the tires needed to be replaced at the same time.

More than likely the battery in the sensors are just drained so they need to be replaced.

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Sunday, January 2nd, 2022 AT 6:42 PM

SZALKUSKT

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Driver Front=1
Passenger Front=2
Driver Rear=3
Passenger Rear=4
Is this correlation correct?

Therefore, My Driver Front and Passenger Rear sensors are the likely culprit so far?

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Monday, January 3rd, 2022 AT 6:48 PM

KASEKENNY

MECHANIC
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That is correct. However, I will caution you and say that I cannot find that specific info on this exact vehicle. However, I have never seen any vehicle that was different. So, I am very confident that this is the case but I just want to be transparent and tell you the manual doesn't label them for us.

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Monday, January 3rd, 2022 AT 7:38 PM