CHECK ENGINE LIGHT!!! Multiple codes

[cancerstinx]

Sonic has 68,000+ miles, check engine light has been on for last 5,000. Below are the codes it's giving. Here's the kicker - car is running fine, except under load it hesitates just a little. Can someone PLEASE give me some advice or info?

p0101 - Mass airflow performance
p0171 - system lean
b1445 control module voltage output circuit short to battery
b1445 - control module voltage output circuit open circuit
b2625 - display dimming pulse width modulation output circuit short to ground
b2730 - interior trunk lid unlatch switch circuit
b3205 - driver window motor internal electronic failure
u0164 - lost communications with hvac control module
u1534 - LIN bus 3 lost communication with device 4

 

[OssiansFolly]

That's a lot of codes...

First, why drive on it for 5,000 miles? If it happened to be under warranty adding miles doesn't help that.

Next, have you taken it in somewhere to have them look it over? It could be a computer issue which most of us can't diagnose.

Last, was your car hit by lightning? Many of those appear to be electrical related...a surge or rodent would be my first guess.

 

[cancerstinx]

It wasn't covered under warranty, and most shops wanted $100 just to diagnose it. It's running fine, everything works, occasional hesitation under load. I figured I'd ask in the forum on the off chance that this silly stuff happened to someone else. I'm going to take it back to the place that ran the codes to see if they can narrow it down.

 

[Mike DZ]

That's a lot of codes...


Last, was your car hit by lightning? Many of those appear to be electrical related...a surge or rodent would be my first guess.

Agree, something is wrong in the CANBUS to possibly include a bad ground

 

[EVOX_SPEED3]

Like everyone already stated, get those codes addressed ASAP. Just because it runs doesn't mean it's fine, especially the lean codes. Are u stock or tuned?

See if u can get the codes cleared using one of those cheap ODB scanners off Amazon, and if they come back, u will know which codes are actually needing to be addressed.

Good luck.

Sent from my SAMSUNG-SM-N910A using Tapatalk

 

[cancerstinx]

Well, as of Monday, the check engine light went off. Weird, but I'll keep an eye on it and the minute it comes back on, I'm going to get it to the shop. Thank you for all the info!

 

[AdorableKaren]

Even if the check engine light goes off, a shop/dealer can still see the codes. And it definitely doesn't mean the car is fine just because the light went off. Get it checked out with or without the light on. Good luck hope it is something small, stupid, and cheap.

 

[cancerstinx]

Yep you're right

Yep, came back on when the weather got a little colder. Making an appt for Friday. Thanks again everyone for your input, it is greatly appreciated!