I installed the new 92mm throttle body’s from Soler on Tuesday and as soon as I started driving the car I got a check engine light. I disconnected the battery again and waited for a while, but the check engine light didn’t go away. I took the car to my local auto parts store and got the codes “P0 10B” and “P0 101”.




I called Solar at 5:18pm and left a voice message. I did not get a response from them, maybe it was too late and they were closed. Next day, Wednesday, I decided to call again around noon, I talked to someone, I believe his name was Tegan, I explained the situation to him, and he said to send the throttle body’s back, in the meantime he was going to check the codes and call me back. I told him that the removal of the throttle bodies was not an easy task and its time consuming. Well, he never called me back regarding the codes. Today is Thursday and I have not heard from Solar. If I take the throttle body’s out and send it to Soler for a replacement I could be out of the car for a week, not to mention all the work of taking them out and putting them back and then hoping not to get a check engine light again.

I decided to go to the dealer; I happened to know someone there. He looked at the codes, they are both throttle body related. One of the codes was failing “On” and “Off”, and the other one fail one time and them it sass. According to him there is a possibility that the codes will come back after been removed. So, he decided to have the computer relearned the new throttle body’s. I got charged $75 for his work.

I just got home with no check engine light but haven’t heard back from Solar.

If you are going to purchase the new 92mm throttle body’s from Solar, there is a possibility you may get a check engine light. If you get the “P0 10B” and/or “P0 101” like I did, most likely disconnecting the battery will not solve your problem. The computer needs to relearn the throttle body’s. This can be done by the dealer or a reputable shop. Maybe there is another solution, but I’m not aware of it and Solar never got back to me. Your other option may be to return the throttle body’s to Soler and wait for a replacement. I guess, this is the price we paid for playing with our toys.
As far as performance, well I was more involve in the check engine light issue than testing the performance. I'm going to put some miles on the car before I can really test them out, I just want to make sure the check engine light stays away. They do look pretty though.

 

Interesting. How long did you have the battery unhooked before you started working on the replacement? Just curious.

 

I hope you get this issue sorted out quickly. It's experiences like this that make me avoid these types of modifications. If Solar wants you to remove the throttle bodies after doing the initial install I wouldn't be all that happy either. Not saying their products aren't worth it but for me I'll take a hard pass.

 

Did you do the idle, stop, wait and repeat procedures or just start and drive? There’s a YouTube video by horsepower obsessed for the 91mm throttle bodies where he outlines the steps. I don’t know if the throttle bodies come with instructions that mention this. It may be the relearn procedure.

 

I disconnected the battery before I started it to work on it and connected it back when I was done.

 

Thank you for being the beta tester.

 

Yeah I was only interested to see if you disconnected the power and then immediately unplugged the throttle bodies to see if there was anything there. However, it was mentioned above. Did you do the full learning process's below?

Idle Relearn Procedure

1. Start the engine and let it idle for 3 minutes (ensure no check engine light and that it is sitting at normal idle RPM, approx. 650-700).
2. Turn the engine off for 1 minute.
3. Start the engine again and let it idle for another 3 minutes.
4. Turn the engine off for 1 minute.
5. Start the engine a third time and let it idle for 3 minutes.
6. Optional: Perform a test drive, allowing the engine to reach operating temperature, and come to a complete stop, allowing it to idle.
7. Turn the engine off for 1 minute.

Post Installation

• Driving Requirement: After installation and initial idle learning, drive the vehicle to at least 44 mph and then allow it to decelerate gradually to a complete stop, letting it idle for a few seconds.
• Repetition: Repeat this deceleration from 44+ mph to a stop at least 4–5 times.

 

lol..... you welcome..

 

Thanks for the write up, its unfortunate to hear about your experience, but im glad you seem to have resolved your issues.

I can happily say that i didnt have to do a relearn with Mamo TBs and havent recieved a CEL with over 1k miles driven.

What do you feel like your gains have been (unless you have also dyno'd)? Do you feel a good increase in pull and throttle response?

Thanks

 

Interesting. I had no issues with mine 91m ones when I installed them.

 

NO, I did not do the Idle Relearn Procedure. I'm not sure if that would of make a difference, and to be honest I don't remember if I got the check engine light as soon as I started the car or once I started to drive. Another thing to consider and this may or may not make a difference, but you know how Milltek cats do not guarantee a cell for car above 2025 with update software, well my C8 Z08 is a 2026 and I don't know if Soler tested a 2026 C8 Z06.

 

This new ones are 92mm and they are completely different than the 91mm.

 

Oh never mind I got the 87mm ones. I wonder if that makes a difference?

 

Yea, I have talked to Mamo in the past, great guy, always answer the phone, great customer service!
As far as gains, which to be honest is the most important part, I will hope to be doing some test runs later today 60-130 and will report back.

 

Too much hassle for a Placebo effect.

 

Speaking of Miltek I got them as they supposedly don’t do a CEL and work with the eVenturi intake. Wrong on both counts! They reverted the change that allowed the eVenturi to work, so I had to use 45 degree mini cats, but I still get a CEL. I use a CELsync for now and it works great to keep the exhaust codes from showing up. But it’s annoying. I plan to tune mine just to stop the exhaust codes.

 

Do you have intake or anything?

 

Do you have intake or anything?

 

@Rcruz2525 Thanks for sharing your experience, and I’m glad to hear the car is running well now.

I do want to clarify a few things for anyone reading through this. Our tech, Teegan, has been in contact with you since the day you first reached out and has been actively working with you throughout the process. As discussed, we did offer to have the throttle bodies sent back for inspection at no cost, including covering shipping both ways, to ensure everything was 100%. At that time, you mentioned you would think about it, and you would give him a call back.

After further review, the codes mentioned are MAF related rather than a direct fault of the throttle body itself. In many cases, when installing a new throttle body, a proper relearn procedure is required. We do provide relearn instructions that do not require a dealer or any special tools. If that step is skipped, it can sometimes trigger a check engine light.

As of today (3/20/2026), Teegan followed up again and confirmed with you directly that the dealer cleared the codes, performed a relearn, and the car is now running perfectly with no issues. We have also reimbursed the $75 dealer charge.

For additional context, we have many of these 92mm throttle bodies in the field, including on our own shop vehicles with extensive testing and no issues. Every unit goes through multiple quality checks before, during, and after assembly prior to shipping. While issues can occasionally happen with any aftermarket part, situations like this are very uncommon.

If you or anyone else has questions or runs into concerns, we are always here to help and will continue to stand behind our products.

Enjoy the car, and we appreciate your feedback.

 

I recently installed the 91mm EFFs and had no issues. This was in conjunction with Eventuri intake.