Check engine, engine malfunction lights, etc

[susan]

Update: The issue was an ac filter not being closed properly on the passenger side filter. The dealership had checked my ac flow during the 5k maintenance service but had not secured the filter properly causing air to get in and trip my check engine light and multiple other warning lights. Once the filter was placed properly and tightened down the warning lights went off.


I was driving and all the sudden my check engine lights, engine malfunction lights and driver start control warning lights came on. The dash cycled through these warning lights and told me to contact the dealer. I will do that tomorrow morning but what in the world is happening? This GX550 has 6200 miles on it and I live 2.5 hours away from a dealership! Has Anyone experienced this issue?

 

[Garauld]

I suggest stopping at a local auto parts store and, assuming they have a code reader, scan the OBD for error codes. Post them here.

 

[BryanM68]

How'd the vehicle drive/sound after the check engine lights coming on? Did you continue to drive?

 

[susan]

How'd the vehicle drive/sound after the check engine lights coming on? Did you continue to drive?

It drove perfectly fine and sounded normal. Nothing seemed off. I thought maybe it was an o2 sensor? I parked the car and will call the dealership tomorrow am.

 

[DJ’s Sled]

Anyone know if loose fuel cap could be cause?

 

[susan]

Anyone know if loose fuel cap could be cause?

Hey thanks for that tip. I’ll check that to see if it clears the issue.

 

[susan]

Hey thanks for that tip. I’ll check that to see if it clears the issue.

It didn’t clear the warnings but great idea. Thanks

 

[susan]

Hey thanks for that tip. I’ll check that to see if it clears the issue.

I spoke to the service department and the technician said even if I tightened the gas cap it takes a lot of cycles starting stopping and cooling down to get the lights to turn off. So I’m hoping the gas cap was the issue. I’ll keep everyone posted but thanks again for that advice!

 

[DJ’s Sled]

Ahh..okay, i hope that’s indeed the case! Good luck.
EDIT: Also just occurred to me…if that’s the case..it might speed the process by filling the gas tank up every other day? But I really don’t know…

 

[susan]

Ahh..okay, i hope that’s indeed the case! Good luck.
EDIT: Also just occurred to me…if that’s the case..it might speed the process by filling the gas tank up every other day? But I really don’t know…

thanks! The technician told me to fill it to halfway and no more. I didn’t ask why but have roughly 200 miles until empty. I’ve cycled through the process 4 times today. Hoping by Thursday this reverses. I’ll keep everyone posted.

 

[Garauld]

If you haven't had the OBD error codes read you're guessing as to the cause. Most chain auto parts stores will do it for free.

 

[VF Tuner]

Weather? Was it very cold?
These engine calibrations have some cold weather and cold + higher elevation bugs.
way worse in the tundra.

 

[susan]

If you haven't had the OBD error codes read you're guessing as to the cause. Most chain auto parts stores will do it for free.

Thanks! I didn’t do that because they were all closed Sunday and when I spoke to the tech at Lexus he said 99% of the time it’s the gas cap. I’m going to keep driving it and let it complete more cycles and if it doesn’t clear I’ll go that route next. Thanks!

 

[susan]

Weather? Was it very cold?
These engine calibrations have some cold weather and cold + higher elevation bugs.
way worse in the tundra.

Hi, no I live in south Texas and it was actually hot. I think it’s the gas cap not being tightened enough but we’ll see. Thanks for the message