Drive Accord Honda Forums banner

201 - 214 of 214 Posts

·
Registered
2020 Accord Sport 2.0T
Joined
·
98 Posts
Guess my K&N Intake will mitigate this problem.
 

·
Elvira
Joined
·
3,437 Posts
On December 24, 2020, Honda released TSB 20-053 for the 2019-2021 Acura RDX (which shares the Accord 2.0T's engine).

POSSIBLE CAUSE
Humid air within the intake tract may condense and accumulate excessive moisture during steady driving.
Hmmmmm !! HUMID air huh?
 

·
Registered
Joined
·
8 Posts
I just drove 4 hours to get my car back from the dealer after 15 days. They replaced fuel injectors and spark plugs.

Codes stored were:
PO300​
PO301​
PO304​
Diagnostic says air/fuel ratio out of range​

As of now, I can only hope the issue doesn’t happen again. Obviously I will post again if more problems arise.
 

·
Registered
Joined
·
554 Posts
Yes the K&N intake being farther back under the hood will help a lot on pulling in water. I would get a CAI there are few nice ones. I will not name which ones but I have seen 2 on a dyno make 10 to 12 hp less over the stock box with a aFe filter so I am not doing one. They do sound good and I am sure less prone to getting wet.
 

·
Super Moderator
Joined
·
1,744 Posts
It may not be an issue with liquid water entering the intake - it may be an issue with water vapor condensing and accumulating in the intercooler and eventually making its way into the cylinders in liquid form where it causes misfires or soaks the MAF sensor causing an incorrect air flow reading. If so, it wouldn't matter where the air was being pulled from (i.e. factory air intake location or aftermarket intake system).

At least in the case of the RDX, the key appears to be humidity. When you take air and compress it (which is what the turbocharger does), the air heats up. You don't want to feed hot air into the engine, so you pass the compressed air through an air-to-air heat exchanger (the intercooler) which dissipates most of the heat back to the ambient air so you have cooler, compressed air going into the engine. When the hot, humid air moves inside the intercooler, the water vapor can condense and turn into liquid. If this liquid can't vaporize before getting sucked into the engine, the engine may misfire.

I suspect the same thing is happening here that happened with Ford's EcoBoost. Condensation in intercoolers is physics 101 and something that manufacturers have to deal with. It looks like Honda missed a particular condition during testing and has now devised a workaround - at least for the RDX. I'd be very surprised if this same fix doesn't come to the Accord.
 

·
Registered
Joined
·
8 Posts
Made it halfway home before my car broke down again. Currently en route to a dealership.
Edited to say that it’s rained on me the entire 135 miles I’ve driven since I got it.
 

·
Registered
Joined
·
554 Posts
zroger73 now that you explained like that you are right. The TSB for the RDX has a different intercooler and it must be designed different to vaporize better. Wonder if a aftermarket intercooler would also do a better job of this than the OEM one.
 

·
Registered
Joined
·
24 Posts
Made it halfway home before my car broke down again. Currently en route to a dealership.
Edited to say that it’s rained on me the entire 135 miles I’ve driven since I got it.
It rained after you picked it up? Should open your airbox like I did take pictures of the water inside.
 

·
Registered
Joined
·
10 Posts
I'm following this thread. Just picked up a new 2020 accord 2.0t exl and it has only 1200 miles. Yesterday I was driving on the highway, and passed a car in the left lane . When I went to get back in the right lane after passing the car, my car hesitated and felt like it lost power for a few seconds. It was quite scary. Power then went right back to normal. Not sure what happened. Continued driving home another 2 hours, and no further issues. After reading this thread, it sounds like my car went into limp mode. I just checked the air filter and it appears dry. I'm going to bring my car into the dealer and have them check it out. Kind of concerned after reading this thread! I did not notice any messages on dashboard.
 

·
Registered
Joined
·
51 Posts
Yesterday I was driving on the highway, and passed a car in the left lane . When I went to get back in the right lane after passing the car, my car hesitated and felt like it lost power for a few seconds. It was quite scary. Power then went right back to normal. Not sure what happened. Continued driving home another 2 hours, and no further issues. After reading this thread, it sounds like my car went into limp mode
No, it didn't go into limp mode, as it would not recover until it was powered down and restarted at a minimum...

All conjecture...

it may be an issue with water vapor condensing and accumulating in the intercooler and eventually making its way into the cylinders in liquid form where it causes misfires or soaks the MAF sensor causing an incorrect air flow reading. If so, it wouldn't matter where the air was being pulled from (i.e. factory air intake location or aftermarket intake system).
There's no MAF, IIRC on the 2.0T at least...

I suspect the same thing is happening here that happened with Ford's EcoBoost. Condensation in intercoolers is physics 101 and something that manufacturers have to deal with.
And they have for the most part...
 

·
Registered
Joined
·
1 Posts
Hello there- recently purchased 2.0 accord 6 spd mt. 2019 , no modifications. 51000 kms on it. When it rains all the error messages come on, the map lights don't work, and the car will suddenly lose power when driving. Taking it into the dealer tomorrow and will let you know what they say.

Has anyone else had the dealer fix this issue? Thanks all
 

·
Registered
Joined
·
59 Posts
i just experienced this issue last sunday. driving on highway in cruise control in eco mode, went to push gas to pass somebody and suddenly power cut off and car lurched, went into limp mode with check engine light flashing. i pulled over and restarted the car and it was like nothing happened. it was raining and i had been driving about 40-50 minutes by that point. OBD scanner reads p0300, p0301, and p0304 so cyl 1 and 4 misfires. i called my local dealer and they said yea idk what could cause that, if the cars running fine just keep an eye on it and let us know if it happens again. was kind of hoping for more but i dunno, dont wanna waste time schlepping back and forth to play part swap. i want a solid answer that will fix and prevent it from happening again. would upgraded intercooler/air intake be the solution or is it related to fuel injectors?

.
 

·
Super Moderator
Joined
·
1,744 Posts
It may not be an issue with liquid water entering the intake - it may be an issue with water vapor condensing and accumulating in the intercooler and eventually making its way into the cylinders in liquid form where it causes misfires or soaks the MAF sensor causing an incorrect air flow reading. If so, it wouldn't matter where the air was being pulled from (i.e. factory air intake location or aftermarket intake system).
Confirmed in TSB 21-052 dated June 3, 2021 applicable to all 2018-2021 Accord 2.0T 10AT models: The MIL Is Flashing with Loss of Power

SYMPTOM
The MIL is flashing with a loss of power.

POSSIBLE CAUSE
Humid air within the intake tract may condense and accumulate excessive moisture during steady driving.

CORRECTIVE ACTION
Replace the intercooler and intercooler gasket. Update and aim the millimeter wave radar, then update the PGM-FI software.
 

Attachments

201 - 214 of 214 Posts
Top