02 acura tl 5th gear blinking, no 5th gear

[marcelo]

Today my panel was blinking non stop, showing green light on 5th. My transmission will not shift to 5Th gear and no manual shifting at all. Any ideas?? Thanks...

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[Ryons02TLTypeS]

i think u gotta prob buddy, remmeber rradin it b4.. about the deadly blinkin D5

[03CoupeV6]

The transmission is dead.

[marcelo]

I find out today that my car alarm PURSUIT mod: pro 9232s was interfering with my car electrical components, like my tranny computer. As soon as I remove this alarm the problem was solved. I note that everytime the trunk door was open the 5th gear green light would not blink after I started it again and as soon as I open the trunk door the 5th green light would go on and off again. I guess I luck it out.

[marcelo]

So I had to turn the ignition key on everytime I open and close the trunk.

[03CoupeV6]

Okay.. weird.

[fsttyms1]

And just for the record a Flashing D5 light Doesnt necessarily mean the tranny is dead. It can mean a # of things.

[marcelo]

I was wondering is there is anybody with a t5 flashing light that end up no being such a too bad of a problem? , like the one that a had with the Pursuit car alarm. It would be nice to know.

[fsttyms1]

I had a Blinking D5 light and it was a tranny temp sensor. Easy to replace. Like i said it blinking doesnt mean that its a dead tranny for sure. There are other things it could be.

[freestye23]

I had the same problem just now, and it was werid cause the car was hesitating in first gear and then the blinking light came on at 5th gear. Then I went to park and my reverse wounldn't work. Then I restarted the car and it worked but hesitating was still their, now I dont know what to do. I think this is the tranny and I have a warrany and gonna bring it to Acura, but wanna know if Anyone ever hear or expirenced this and have any suggestions....

[sturgeongeorge]

Originally Posted by freestye23

I had the same problem just now, and it was werid cause the car was hesitating in first gear and then the blinking light came on at 5th gear. Then I went to park and my reverse wounldn't work. Then I restarted the car and it worked but hesitating was still their, now I dont know what to do. I think this is the tranny and I have a warrany and gonna bring it to Acura, but wanna know if Anyone ever hear or expirenced this and have any suggestions....

I had this same problem this evening. What did you come up with?

[sturgeongeorge]

Originally Posted by fsttyms1

I had a Blinking D5 light and it was a tranny temp sensor. Easy to replace. Like i said it blinking doesnt mean that its a dead tranny for sure. There are other things it could be.

did that sensor cause the transmission not to shift properly?

[Edward'TLS]

Pull the fault code(s) out from the PCM. That's the only way to find out what exactly is the problem. Much better than pure guessworks.

[sturgeongeorge]

Originally Posted by Edward'TLS

Pull the fault code(s) out from the PCM. That's the only way to find out what exactly is the problem. Much better than pure guessworks.

pulled code p0720

[h8shwz]

Originally Posted by sturgeongeorge

pulled code p0720

What does it mean? My car has went into gear 2 time now it wont move at all. When I drove it last the D5 light was blinking when I got up to 10mph?? Can any one help me out?

[3.2TLc]

Hey H8shwz, ya pulled up a rather old thread......but to answer your question about the code P0720 : It's indicating a potential problem within the Countershaft Speed Sensor Circuit. Are you getting any other codes ?

Check the MAP sensor, if ok...then inspect the Countershaft Speed Sensor wiring harness connector. Could be loose or corroded, maybe a poor ground or shorted. Clear the codes and see if the CEL comes back on. It could be that the Countershaft Speed Sensor is faulty and needs replaced ?