PeterBishop

2018 MDX Errors popped up on my wife's car suddenly

• Electric Parking Brake Problem
• Emissions System Problem

These are unrelated and it leads me to believe that something electronic went wacko.

Does anyone know what this is? I have to take it in to the dealer for a recall notice, but I don't want to give them another thing to charge me for.

thoiboi

low battery. throw it on a tender and recheck

PeterBishop

That's easy! I'll go put it on a trickle.

jdpdata

Let me guess...you don't do alot of driving and your car has been sitting for long time. Common issue with dead 12V battery. Get trickle charger or replace that 12V every 2-3 yrs.

PeterBishop

Actually NO. She drives it ever day and I drive it in the evenings. If it's the original battery, it could be at least 7 years old.
I have a Dodge RAM Cummins Diesel. I'd say almost every time codes go on in that, it's always the battery. I didn't expect this from Japan.

PeterBishop

If it's the battery, should I clear the Codes? It has a couple emissions codes for the O2 Sensor.

thoiboi

When you replace the battery, the codes will disappear as well since power will be disconnected but if the problem is still there, it will come back

jdpdata

7 years old battery is insane!! You're taking a huge risk getting stranded. We're on my 3rd battery in our 2017 MDX with very low miles, only 40K miles. We only drive maybe 1-2K per year. First couple years wife drove it to work alot and had no 12V battery issues, but last couple years it been sitting in garage most of the time. It dies every couple of years but luckily dealer cover replacements under warranty. These newer cars with electronics on-board will drain your battery very fast. Also don't keep the keyfob too close to the car. It constantly communicate with car and will drain both keyfob coin-battery and car's 12V battery quickly. Best to keep it on trickle charger if you don't drive much.

thoiboi

You think Japan is using some super secret battery technology that they're not sharing with US and the rest of the world? 7 years is a definitely pushing it..

PeterBishop

I had it on a Tender all night and the battery is 12.1 volts. That's to low, right?

thoiboi

12V alone is 'fine'. When you start the car with the engine/alternator running, it's 14V+ right?

PeterBishop

Yes, it's 14.1 to 14.3 running.
after a night of charging it was 12.1 cold
I don't know if it was lower before I put the trickle on

Do you recommend a battery?

thoiboi

If you're still running into issues after the trickle charge then yeah i would say it's about time to replace the battery. You're right about at the lifespan of modern batteries ~6 years so it definitely won't hurt anything but your wallet.

PeterBishop

I opened the Battery Box and its a Costco Superior AGM Technology Battery
H6 (48) AGM
CCA 760
36 Month Warranty

It's got a 2/22 date on it, so it's only 2 years old.

I cleared the codes. We have not driven it, but the only remaining code is P0159 (O2 Sensor Circuit Slow Response)

That could be another issue.

bigbingo

Can you please share how to clear the code? I have the same issues with two error messages showing up during driving yesterday, since I had issues last year with the battery, so I just replaced the battery today but after all done, the messages still there, I thought they will go away but not the case, someone said it may take a couple of days driving and then they will disappear ... hope someone can share some OPEX, thanks

phybridmdx

Hello....di you find a resolution?

bigbingo

No, unfortunately not yet these two error messages did disappear after two days after I drove a lot including highways, but they came back again and did not disappear yet. I did search some of online tips, they said it need to go through full cycle of driving to settle down, but it has been almost two weeks now. I want to give two more days to see if they will disappear by themselves.