2004 Acura MDX D5 Blinking Light

[SG4MDX]

Hey guys,

I am new to the forum and have a 2004 Acura MDX with 169k miles. Drives great but now the d5 light started blinking. The car never has any problems and runs amazing like new. But this light started blinking and i am scared about it and hopefully my transmission is not on the way out. After yesterday drove it about 15 miles and no light. Today my mom said that it was blinking again. I am not mechanically inclined and it seems like the weather has been raining alot today and 100 degrees yesterday. But what should I do?

[nsxtasy]

Originally Posted by SG4MDX

what should I do?

First, look in the owner's manual. When you do, you'll find that on page 172, it says, "The ‘‘D5’’ indicator comes on for a few seconds when you turn the ignition switch to ON (II). If it flashes while driving (in any shift position), it indicates a possible problem in the transmission."

Make sure that it's not just blinking when you turn the car on, which is normal. (Maybe your mom was noticing it when she was just starting the car?) If you're sure it's blinking while the car is driving, then take it in for service, either to the dealer or to a good independent mechanic, and let them figure it out.

[kmscrap]

I just had the very same thing happen to me. Apparently this is not uncommon. I do not have a copy of the work order, but a part was replaced that had to do with the different gears and now it no longer flashes. I suspected loose wire or such as my Torque Converter had just been replaced prior to this. Sorry I cannot be more specific. I need to call on Monday and have them send me a copy of my work order.

Kristin

[JL_SS]

Originally Posted by SG4MDX

Hey guys,

I am new to the forum and have a 2004 Acura MDX with 169k miles. Drives great but now the d5 light started blinking. The car never has any problems and runs amazing like new. But this light started blinking and i am scared about it and hopefully my transmission is not on the way out. After yesterday drove it about 15 miles and no light. Today my mom said that it was blinking again. I am not mechanically inclined and it seems like the weather has been raining alot today and 100 degrees yesterday. But what should I do?

First, make sure the fluid is not low.

Could be as simple as a pressure switch, especially if it still drives fine. Take it to the dealer to determine the trouble code/s that triggered the blinking D5.

This thread shows how to read the code yourself for a 2003 Pilot. Not sure it is exactly the same for a 2004 MDX. The transmissions are different in a 2004 MDX/2003 Pilot: Link[

[boston]

Check coolant level and color.

[kmscrap]

My D5 Flashing ended up being that both the 3rd & 4th pressure switches failed. The dealership replaced the 3rd & 4th pressure switches. No more D5 flashing.

Kristin

[SG4MDX]

hey Boston was right! My coolant was empty guys. Should it stop blinking? Might have saved myself some money! thanks all.

[xilync]

Originally Posted by kmscrap

My D5 Flashing ended up being that both the 3rd & 4th pressure switches failed. The dealership replaced the 3rd & 4th pressure switches. No more D5 flashing.

Kristin

This.

[KenehPalmer]

I suspected loose wire or such as my Torque Converter had just been replaced prior to this.

[SG4MDX]

hey guys light hasnt come up after the fill of coolant. Do you guys think thats why my mdx was lighting up? Thanks

[argiclan]

The blinking D5 can be the beginning of bad things related to the tranny. Take it somewhere and pull codes. Autozone does it free. Acura will likely charge $ for this or you can find a small shop that specializes in Honda as well. Hopefully it's something minor like the 3rd and/or 4th gear pressure switches. This just happened with my TL (yes, I know this is an MDX thread) and it was a failing tranny. Best of luck.

[pingopongo]

My D5 light was flashing recently after a large down pore of rain. Being an Auto Electrician I suspected water in the trans electrical plugs ( water shorts out signals from Range sensor and tells ECU conflicting info thus D5 light comes on) . I removed the Range sensor plug and blew it out dry then packed it with grease to water proof it and re installed. Looks like it's the same issue as his one as he said it had rained recently when he had the problem. It's been a year now and I have had no issues again. Cheers

[klecci]

Greetings,
I have a 2001 mdx with 145880miles on it, I drove about 150miles yesterday & the x did well without issues but after washing it this morning including the engine, I noticed the D5 blinking as I revved the engine & about the same time, I heard a small noise under the steering.
I quickly turned off the ignition, checked the fuse & found fuse no. 6 (pcm ecu) blown.
I also scanned the car & codes p1298 & p1768 were thrown.
I started d car, engaged d reverse & it was jumpy(quick to enter) so I left it till now, I also haven't changed the blown fuse.
Any ideas will be appreciated as much as I appreciate this forum.
Many thanks.
Kc

[lion9mdx]

Originally Posted by klecci

I have a 2001 mdx with 145880miles on it, I drove about 150miles yesterday & the x did well without issues but after washing it this morning including the engine, I noticed the D5 blinking as I revved the engine & about the same time, I heard a small noise under the steering.
I quickly turned off the ignition, checked the fuse & found fuse no. 6 (pcm ecu) blown.

My understanding is that washing an engine isn't a good idea unless you know what parts to cover to keep from getting wet (which I don't). My guess is that you got something wet that isn't designed to be wet. If you can let it dry out for a few days, maybe the problem will clear up.

[klecci]

Ok, thanks for the response.
If you don't mind, could it be the reason the pcm fuse blew? If yes, should I go ahead & replace the 15amp fuse?