For those having Transmission Issues with their CX-5
- Thread starter jeisensc
- Start date
I had the same thing happen to me twice last year (hasn't repeated since) I took to the dealer and they said this:
CHECKED FOR CODES AND FOUND U0401--INVALID
DATA RECEIVED FROM PCM
CHECKED FOR TSB'S AND NOTED--09-14-25
HOWEVER THIS TSB ONLY APPLIES FOR VEHICLES
THAT HAVE HAD DAMAGE
ACCIDENT CHECK PERFORMED AND VEHICLE HAS
NOT BEEN IN ANY ACCIDENTS.
Since it hasn't repeated itself, they are unwilling to dive deeper into the issue, even after contacting Mazda Canada. See my post (#155 on this thread) for the rest of the info. Essentially if the car isn't doing it constantly, they aren't willing or unable to diagnose further. Luckily it hasn't happened again. I suspect it is some kind of software glitch, but who knows....? For peace of mind, I'd take it to the dealer to see if they can read any codes. If Mazda gets enough people doing this, perhaps they will lurch into action...especially if they think safety and public perception will factor in. Good luck.
I started reading this thread after I posted my own. I have Rota grids on my CX5 and my wife had a similar issue. Her car jolted, lost power and was in limp mode but no dash lights came on. Took it to Mazda and they said it was the wheels. The diameter is different. I did my research and the wheels are .2inches smaller than the oem 19's. They also have almost the exact revolutions per mile as oem. They reset the car and gave it back and as we pulled out of the service garage, it did the same thing. jolted, a couple of clunks and back to limp mode. Flipped a u'y and brought it back in. This was last week. Today, they were able to put oem wheels on and the problem persisted. There are no fault codes or warning lights coming up. They are now asking Mazda if they are going to replace the tranny or send out a specialist. So frustrating.
Oh, its a 2015 CX5 AWD GT.
Oh, its a 2015 CX5 AWD GT.
Sounds like a SAFETY ISSUE
That sounds like a safety issue now. I would not be shy about informing Mazda that the incident will be reported to the NTSB!
Maybe that will light a fire under them!
That sounds like a safety issue now. I would not be shy about informing Mazda that the incident will be reported to the NTSB!
Maybe that will light a fire under them!
This sounds like the same problem that happened to my old Mazda 3. It was a June 2012 build and the transmission went after 500 km (within the first week of ownership!). They replaced the entire transmission under warranty. My father-in-law had his go somewhere around 40,000 km, his is also a summer 2012 Mazda 3. I didn't realize this problem has been still rearing its head.
I was able to bail off the major road within a block or two, something didn't feel right the moment before everything crapped out so I was already looking for an exit path. I think I was stuck in 1st, almost redlining it to get enough speed to change lanes and turn.
I was able to bail off the major road within a block or two, something didn't feel right the moment before everything crapped out so I was already looking for an exit path. I think I was stuck in 1st, almost redlining it to get enough speed to change lanes and turn.
After a week of them trying to figure it out, they decided to replace the transmission under the warranty. Good news! Just gotta wait for it to come in now....and hope they didn't F up the wheels!
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Registered here today after researching transmission failures for this car. Mine is a 2016 Touring with approximately 700 miles. Currently in shop waiting for a new transmission to be shipped. Many of these posts describe what happened to my car. Warning lights coming on and loss of power. I'm reporting this to Mazda and NTSB
Any updates on your ride?
No pics, sorry
We just had this happen on my wife's 1-year-old 2015 CX-5. Transmission stopped shifting within a mile from home. Engine light, TPS light, TCS light, AT light all came on. The car hadn't been driven for at least six hours previously, ambient temperature was in the 50s.
She pulled over and I had her cycle the system, but she didn't fully turn it off, just stopped and restarted the motor. The problem recurred within a few blocks. She pulled over and turned the car off while we did a little poking around on the net. When she turned it back on the problem did not immediately recur. We drove it the couple of miles home, this time in manual rather than auto mode (because that's what I like and I was driving this time
, again without trouble.
At home I pulled out the OBD-II reader and got two codes, each repeated twice:
P0847 - Trans fluid press sensor / switch B circuit low
P0780 - Shift malfunction
I haven't been through this thread entirely, but since this problem was occurring with 2013 models and ours is a 2015 I think it's fair to say that it's not an early production problem, as some suggested, or a problem limited to a certain production run. Also, it seems unlikely that the 2015 does not have software updates that were available in 2013.
I don't recall the mileage on the car, and I'm too lazy to check at the moment, but it's 1 year old now and is unlikely to be more than 15,000.
The thing is still under warranty, so this is the dealer's problem tomorrow, but I thought I would at least add one more voice to the crowd.
She pulled over and I had her cycle the system, but she didn't fully turn it off, just stopped and restarted the motor. The problem recurred within a few blocks. She pulled over and turned the car off while we did a little poking around on the net. When she turned it back on the problem did not immediately recur. We drove it the couple of miles home, this time in manual rather than auto mode (because that's what I like and I was driving this time
, again without trouble.At home I pulled out the OBD-II reader and got two codes, each repeated twice:
P0847 - Trans fluid press sensor / switch B circuit low
P0780 - Shift malfunction
I haven't been through this thread entirely, but since this problem was occurring with 2013 models and ours is a 2015 I think it's fair to say that it's not an early production problem, as some suggested, or a problem limited to a certain production run. Also, it seems unlikely that the 2015 does not have software updates that were available in 2013.
I don't recall the mileage on the car, and I'm too lazy to check at the moment, but it's 1 year old now and is unlikely to be more than 15,000.
The thing is still under warranty, so this is the dealer's problem tomorrow, but I thought I would at least add one more voice to the crowd.
I'm surprised more don't break with the complexity of modern transmissions!
Hopefully you get a brand new transmission out of the deal. (guitar)
We just had this happen on my wife's 1-year-old 2015 CX-5. Transmission stopped shifting within a mile from home. Engine light, TPS light, TCS light, AT light all came on. The car hadn't been driven for at least six hours previously, ambient temperature was in the 50s.
She pulled over and I had her cycle the system, but she didn't fully turn it off, just stopped and restarted the motor. The problem recurred within a few blocks. She pulled over and turned the car off while we did a little poking around on the net. When she turned it back on the problem did not immediately recur. We drove it the couple of miles home, this time in manual rather than auto mode (because that's what I like and I was driving this time
At home I pulled out the OBD-II reader and got two codes, each repeated twice:
P0847 - Trans fluid press sensor / switch B circuit low
P0780 - Shift malfunction
I haven't been through this thread entirely, but since this problem was occurring with 2013 models and ours is a 2015 I think it's fair to say that it's not an early production problem, as some suggested, or a problem limited to a certain production run. Also, it seems unlikely that the 2015 does not have software updates that were available in 2013.
I don't recall the mileage on the car, and I'm too lazy to check at the moment, but it's 1 year old now and is unlikely to be more than 15,000.
The thing is still under warranty, so this is the dealer's problem tomorrow, but I thought I would at least add one more voice to the crowd.
No doubt that there will still be early failures from time to time. Might be a bad sensor? Please keep us updated on the fix.
Hello all,
Brand new to the forum even though I read it pretty thoroughly before buying my CX5 in June of 2014. I am not a car person so I'm not going to be using car lingo here so bear with me.
Tonight after driving a half hour down the highway with no problems at 70ish mph, I was driving down a side road going about 35 mph when suddenly at a light my car jerked as if I had been rear-ended. I looked behind me and there was no one there. I tried to accelerate and the car was dragging (the gauge said I was going 3rpms??) but I was only getting up to close 20 mph. It sounded as if I was revving the engine significantly. It then jerked several times again and stopped driving. I thought I had accidentally knocked the car into neutral but sure enough it was still in drive. This continued for several more minutes down the road with having to pull over and let traffic go by so I didn't kill anyone with the sudden stopping, until I could find a place to pull over. I then called my Mazda dealership who suggested I shut off the car completely and restart and drive around the parking lot. I did so and for a few minutes it was fine before jerking to a stop again and suddenly the traction control, engine, tire pressure and AT? lights all came on. The Mazda dealership then instructed me to get the car towed immediately.
So since it was after hours I won't have a better idea for what is going on until tomorrow but here are the car specs:
2015 CX5 touring model, automatic, AWD, 24,450 miles. I just had the car in for its regular service (albeit a bit late) right before New Years. No prior problems except for a nail in the tire once. I love the car and how it drives and have not had any concerns or even hints of a problem until that moment it felt like I had been hit.
I'm just sharing for note keeping purposes on what appears to be an ongoing problem in this model. It was a bit terrifying to think the card would just jerk to such a sudden stop in traffic. Glad it happened on the city street and not the highway.
Brand new to the forum even though I read it pretty thoroughly before buying my CX5 in June of 2014. I am not a car person so I'm not going to be using car lingo here so bear with me.
Tonight after driving a half hour down the highway with no problems at 70ish mph, I was driving down a side road going about 35 mph when suddenly at a light my car jerked as if I had been rear-ended. I looked behind me and there was no one there. I tried to accelerate and the car was dragging (the gauge said I was going 3rpms??) but I was only getting up to close 20 mph. It sounded as if I was revving the engine significantly. It then jerked several times again and stopped driving. I thought I had accidentally knocked the car into neutral but sure enough it was still in drive. This continued for several more minutes down the road with having to pull over and let traffic go by so I didn't kill anyone with the sudden stopping, until I could find a place to pull over. I then called my Mazda dealership who suggested I shut off the car completely and restart and drive around the parking lot. I did so and for a few minutes it was fine before jerking to a stop again and suddenly the traction control, engine, tire pressure and AT? lights all came on. The Mazda dealership then instructed me to get the car towed immediately.
So since it was after hours I won't have a better idea for what is going on until tomorrow but here are the car specs:
2015 CX5 touring model, automatic, AWD, 24,450 miles. I just had the car in for its regular service (albeit a bit late) right before New Years. No prior problems except for a nail in the tire once. I love the car and how it drives and have not had any concerns or even hints of a problem until that moment it felt like I had been hit.
I'm just sharing for note keeping purposes on what appears to be an ongoing problem in this model. It was a bit terrifying to think the card would just jerk to such a sudden stop in traffic. Glad it happened on the city street and not the highway.
WHERE IS MAZDA ON THIS ISSUE???
This just happened to me tonight.
I have 2014 CX-5 Grand Touring FWD with about 26k miles. All services have been handled by a Mazda Dealer.
Tonight, while returning from Antioch CA to San Jose CA via I-680 I had a very scary situation that came out of the blue in the hills region.
It had been raining heavily and traffic was fairly heavy. For most of the time I had Speed Control engaged at 60 mph but based on the surrounding traffic I would disengage Speed Control and use the accelerator to slow down or speed up. I had noticed that on occasion there had been a feeling of momentary loss of traction. This happened mainly when changing lanes or transiting a deeper puddle.
I had been driving for about 5 minute using the accelerator to control speed and as I was at just about 60mph (the setting on the Speed Control) I started to change lanes and at about the same time engaged the Speed Control.
THIS IS WHERE THE SCARY PART STARTS.
The car immediately decelerated and at the same time the Tach reading went up to about 6k. I tried to recover using the accelerator but this only made the situation worse because the sped would increase and then decrease. I turned on my Emergency Flashers and managed to make my way over to the curb lane without crashing in spite of the fact that most of the traffic was at about 50~60mph. Once I got to the curb lane I stopped. Then I slowly accelerated up to about 40mph in the curb lane and merged into the right-hand lane once I was confident that I had regained speed control. From this point I did not re-engage Speed Control and was able to drive at about 60mph so I could return home.
I have NEVER had this happen before. It was raining heavily and there was water on the road but I didn't see any spots where it was running across the road like a river.
Let me say, THIS IS NOT ACCEPTABLE and I hesitate to think what might have happened if I had been an inexperienced driver in this situation.
I hope I am not alone in experiencing this and Mazda had developed a software fix for the problem.
I firmly believe this was caused by a conflict between the Traction Control, Speed Control, and feed back coming from a wet surface.
This just happened to me tonight.
I have 2014 CX-5 Grand Touring FWD with about 26k miles. All services have been handled by a Mazda Dealer.
Tonight, while returning from Antioch CA to San Jose CA via I-680 I had a very scary situation that came out of the blue in the hills region.
It had been raining heavily and traffic was fairly heavy. For most of the time I had Speed Control engaged at 60 mph but based on the surrounding traffic I would disengage Speed Control and use the accelerator to slow down or speed up. I had noticed that on occasion there had been a feeling of momentary loss of traction. This happened mainly when changing lanes or transiting a deeper puddle.
I had been driving for about 5 minute using the accelerator to control speed and as I was at just about 60mph (the setting on the Speed Control) I started to change lanes and at about the same time engaged the Speed Control.
THIS IS WHERE THE SCARY PART STARTS.
The car immediately decelerated and at the same time the Tach reading went up to about 6k. I tried to recover using the accelerator but this only made the situation worse because the sped would increase and then decrease. I turned on my Emergency Flashers and managed to make my way over to the curb lane without crashing in spite of the fact that most of the traffic was at about 50~60mph. Once I got to the curb lane I stopped. Then I slowly accelerated up to about 40mph in the curb lane and merged into the right-hand lane once I was confident that I had regained speed control. From this point I did not re-engage Speed Control and was able to drive at about 60mph so I could return home.
I have NEVER had this happen before. It was raining heavily and there was water on the road but I didn't see any spots where it was running across the road like a river.
Let me say, THIS IS NOT ACCEPTABLE and I hesitate to think what might have happened if I had been an inexperienced driver in this situation.
I hope I am not alone in experiencing this and Mazda had developed a software fix for the problem.
I firmly believe this was caused by a conflict between the Traction Control, Speed Control, and feed back coming from a wet surface.
flyfisherdon
Member
- :
- 2015 Mazda GT w/tech
NEVER use cruise control in heavy rain. We see this happen up here fairly often as Mike M will attest, being from northern Washington.
This is normal. People scoffed at me earlier. You were CHANGING lanes? That was the root cause. The speed control module gets confused when changing lanes and if its still activated as it detects there's no car in front suddenly or detects a car in the lane you're switching to, suddenly (assuming there were none in the original lane or very far away). That's when it'll rapidly accelerate (1st. case), decelerate (2nd. case) with high RPM, etc. Ideally, you should press gas to cancel speed control prior to switching lanes. Better cars auto temporary de-activate when turn signals are switched on.
- :
- Plano, Texas, USA
Tom95134 doesn't have Mazda Radar Cruise control (MRCC) like you do so his situation is totally different from yours. And I could not find any warnings of changing lanes from owner's manual while using MECC other than generic "do not rely completely on the MRCC system...", so what is the fault doing lane changes with MRCC on?
To Tom95134, please file a safety complaint to NHTSA and report this incident to Mazda North American Operations' Customer Experience Center. Every system has its limitations. This may force Mazda to look into the issue and make some safety improvement hence save some lives later.
BTW where does the manual say "NEVER use cruise control in heavy rain"?
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