After oil changed i got a check engine light (emissions system prblem), Rev matching system, ACC, LKAS, Auto High Beam and brake system prob.

TommyC1028

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So just over the weekend I changed my oil and filter and put drain plug bolt with new crush washer, used oem honda oil filter, mobil 1 0w-20 oil and filled it up let it run a bit checked oil level all was good, reset oil life. Left my house got 5 miles down the road and all these lights come on. Check engine( emissions system problem), Rev matching system problem, Adaptive Cruise Control, Collision Mitigation, Auto High Beam, Brake System light, and LKAS light I believe. The car is a 2021 Civic Type R with just over 20,000 miles. I bought it in October of last year with just under 16,000 miles. Since then up until now the car has been great. No problems whatsoever. I'm the 2nd owner. The girl that had it before me installed the Hondata Flashpro with the jailbreak, prl hvi with street maf, and an AWE Touring Exhaust which I think she said she did it in 2022. So immediately after getting all of those lights I went to Jiffy Lube where a buddy of mine is the assistant manager there and he scanned it for me and these codes popped up, P2243(A/F Sensor S1 VCENT Circuit High Voltage) Status: current/PGM-FI, EPS(Electric Power Steering) a U0100-00(F-CAN Malfunction EPS Control unit- PCM) Status- current, a U0416-68(VSA System Malfunction) Status- current, Active Damper System a U3003-16 and a U0100-00 which are both Active Damper System codes, and last was a Integrated Driver Support System code a U0401-68. So altogether 6 different codes. I have an appointment this Friday at Honda but I was just curios if anyone has seen or experienced all of these codes pop up together like this? I'm hoping it's something under warranty and Honda just takes care of it. Any help would be appreciated.
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I'd reset the vehicle by removing the battery. I doubt there is a real problem, more likely, something related to an electrical glitch that these cars are prone to.
 
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TommyC1028

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I'd reset the vehicle by removing the battery. I doubt there is a real problem, more likely, something related to an electrical glitch that these cars are prone to.
Hey I honestly was going to do that tomorrow morning. I should have thought about it that day but I didn't. But you make a very good point about the battery. I had a focus ST before this and I know when the battery went on it all sorts of weird electrical things happened. I definitely appreciate your help.
 

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Hey I honestly was going to do that tomorrow morning. I should have thought about it that day but I didn't. But you make a very good point about the battery. I had a focus ST before this and I know when the battery went on it all sorts of weird electrical things happened. I definitely appreciate your help.
Before you go straight to replacing it, just try disconnecting it and touching the terminals together for like 30 seconds. This will fully power drain and reset everything in the car. You will probably get some similar lights on startup as the systems have to re-initialize, but if you drive around for 10 minutes or so they should go away. That's just if it's an electrical glitch like mentioned above, it still may be a bad battery. But this way you can at least try a fix out before buying a new one.
 
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Before you go straight to replacing it, just try disconnecting it and touching the terminals together for like 30 seconds. This will fully power drain and reset everything in the car. You will probably get some similar lights on startup as the systems have to re-initialize, but if you drive around for 10 minutes or so they should go away. That's just if it's an electrical glitch like mentioned above, it still may be a bad battery. But this way you can at least try a fix out before buying a new one.
Yeah I definitely agree with you on just disconnecting the battery and going from there. At least I can rule that out of the equation. I noticed yesterday and this morning that when I first start driving for like the first 5 or 10 minutes going trough the gears it feels like it's hesitating and sluggish. Almost feels as though it's starving for fuel kind of. Definitely strange. Thanks for your help.
 


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Yeah I definitely agree with you on just disconnecting the battery and going from there. At least I can rule that out of the equation. I noticed yesterday and this morning that when I first start driving for like the first 5 or 10 minutes going trough the gears it feels like it's hesitating and sluggish. Almost feels as though it's starving for fuel kind of. Definitely strange. Thanks for your help.
Yeah of course man, I hope you can get this figured out. Are you noticing this behavior because you're trying to push the car in the first few minutes, or just in how it feels even driving it conservatively? You mention it seems like maybe starving for fuel, is it sputtering at all or just performing under where you'd expect?
 

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To OP, this sounds almost exactly what happened to me when my harness needed replaced due to the recall. All sorts of errors, rev match, emissions, etc. And the car became extremely sluggish, like a prius was moving faster off the line than I was at normal start of a light.

I didn't think that the 2021s had that issue, as mine was a 2017, but it sounds extremely similar.
 
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Yeah of course man, I hope you can get this figured out. Are you noticing this behavior because you're trying to push the car in the first few minutes, or just in how it feels even driving it conservatively? You mention it seems like maybe starving for fuel, is it sputtering at all or just performing under where you'd expect?
Actually I'm driving very conservatively and it just seems sluggish so I've been trying to keep the rpms below 4k between shifting gears. Basically trying to baby it until I get it to the dealership tomorrow. Once it warms up after driving a few miles it seems more responsive like it should. I'm hoping it's just that wiring harness I keep hearing about. I'll definitely let you know what the tech at Honda says tomorrow.
 
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To OP, this sounds almost exactly what happened to me when my harness needed replaced due to the recall. All sorts of errors, rev match, emissions, etc. And the car became extremely sluggish, like a pius was moving faster off the line than I was at normal start of a light.

I didn't think that the 2021s had that issue, as mine was a 2017, but it sounds extremely similar.
I'm really hoping it's something simple and easy to fix that's under warranty. The only recall I have on the car is one that literally just popped up and it's a safety recall. States, a capacitor in the printed circuit board of the front passenger seat weight sensor may crack and lead to an internal short C
To OP, this sounds almost exactly what happened to me when my harness needed replaced due to the recall. All sorts of errors, rev match, emissions, etc. And the car became extremely sluggish, like a prius was moving faster off the line than I was at normal start of a light.

I didn't think that the 2021s had that issue, as mine was a 2017, but it sounds extremely similar.
Man I'm hoping it's just a harness like you said or something simple and easy to fix that's under warranty. Other than feeling a little sluggish at first when I start driving the car drives perfectly fine. I had a Focus ST before the Type R and I remember when my Alternator and battery went I had every light imaginable pop up on the dash and the car went into limp mode. I know electrical issues on vehicles nowadays can cause all sorts problems. Sometimes the codes you get when you scan a vehicle will seem so unrelated to the actual problem. Thanks for your help I appreciate it! I'll let you know what they find tomorrow at Honda.
 

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I'm really hoping it's something simple and easy to fix that's under warranty. The only recall I have on the car is one that literally just popped up and it's a safety recall. States, a capacitor in the printed circuit board of the front passenger seat weight sensor may crack and lead to an internal short C

Man I'm hoping it's just a harness like you said or something simple and easy to fix that's under warranty. Other than feeling a little sluggish at first when I start driving the car drives perfectly fine. I had a Focus ST before the Type R and I remember when my Alternator and battery went I had every light imaginable pop up on the dash and the car went into limp mode. I know electrical issues on vehicles nowadays can cause all sorts problems. Sometimes the codes you get when you scan a vehicle will seem so unrelated to the actual problem. Thanks for your help I appreciate it! I'll let you know what they find tomorrow at Honda.

And it could very well be a failing battery. When my battery started to go, I started getting odd errors with it as well after a winter garaging. Not as many as you have, but still possible. Also, easiest to correct. Wish you the best!
 


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And it could very well be a failing battery. When my battery started to go, I started getting odd errors with it as well after a winter garaging. Not as many as you have, but still possible. Also, easiest to correct. Wish you the best!
Thanks I appreciate it! You're absolutely right about when the battery starts going it can cause a lot of electrical issues and warning lights coming on.
 

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Change battery - assess.
 

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I had basically the exact same thing happen to me. Multiple codes flashing one after the next for no real reason. Long story short, I had a gps tracker plugged into my OBD port. Turns out it was interfering with the car’s computer. I unplugged it and never had any more problems.
do you have anything plugged into your OBD port?
 

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Ignore for now all the U- codes, they are likely a side effect.

The key ones are the P2243 and PGMF1. Check the wiring to the O2 sensor and to the steering rack. Maybe you accidentally disturbed a connector.
 
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I had basically the exact same thing happen to me. Multiple codes flashing one after the next for no real reason. Long story short, I had a gps tracker plugged into my OBD port. Turns out it was interfering with the car’s computer. I unplugged it and never had any more problems.
do you have anything plugged into your OBD port?
I actually just found out today from Honda that it is the wire harness on the one O2 sensor. Not quite sure how it went bad but when I did my oil change I didn't touch or hit anything. Literally drained oil, change filter, installed drain plug with new crush washer, added the proper amount of oil. Started it up and let it run for a few minutes and checked for any leaks which there wasn't any. Turned car off and checked the oil level and added a little bit more oil to get it to proper level. After that I drove like 5 miles and out of nowhere all these lights came on. The dealer didn't have the o2 sensor/wiring harness in stock and had to get it out of California so I gotta wait til next week to get it fixed. It's under warranty so no cost to me. I have a prl hvi, awe touring exhaust, and Hondata Flashpro and I was praying they weren't gonna tell me that my warranty is null and void cause of modifications but they didn't care whatsoever.
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