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My beloved Leaf is applying ABS/traction control (skiddy car light comes on) when it gets above 30mph- it pulsates and pulls slightly to the left.

Story so far for those interested and who may be able to suggest something or have had the same issue. My (new) garage cant find the issue after several days of tests etc so have suggested we take it to Nissan to look into it. I didnt take it to Nissan originally as it is a fair distance away and it didnt feel safe to drive.

Story so far.....
* Blowout at 65mph on motorway to passenger front. Taken by RAC to nearest garage open at that time on a Sunday. They put on a spare tyre. No issues driving to garage several miles away. Replaced tyre and as per suggestion, driver front tyre also replaced. Suggested tracking and return next day. Prior to this I've never had any issues with it.
*returned next day for tracking. Stated it was -16 out. Left garage and with in 500 yards light and pulsating came on briefly- put this down to me taking a wet corner too fast. It continues to do this so returned to garage that completed tracking and they said due to tracking so far out, ABS needed resetting via computer at a proper garage. So took to local garage (going for years, but now new owners) who used a handheld computer, but didnt work.
*booked car in with our usual garage as MOT needed and wanted the pulling to right on acceleration and traction/ABS issue checking. MOT done and failed on driver side suspension joint. This was replaced and MOT passed. Collected car and straight away it did the same issue as before. Booked back in again and told this time it was because of tracking which needed doing again. Tracking done by a tyre place, who were concerned and said it needed looking at.
*went to a recommended garage for a second opinion. He test drove and did a through inspection stating that the passenger suspension joint had gone, wishbone and track rods. He replaced all of these and re did tracking on all 4 tyres. This solved the pulling to the right on acceleration issue.
*Traction/ABS still coming on at 30 mph and car pulsates and pulls to the left. He has had it in again done visual etc and taken it out with the computer to test the speeds etc, but just cant find what is causing it. He suggested to take to Nissan to see if they have had this before or have better systems for diagnosing.

All tyres are the same size, at the right pressure etc as ones replaced.

Any ideas or similar experiences. It has been issue free for almost 4 years and so far I'm over £700 in with no answer and lost all confidence driving my beloved car.
 

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Tracking / alignment being out will not cause false triggering of the traction control or ABS, so whoever said that was talking piffle.

You say the tyres are the same size, but are they the same brand ? I presume only the front left tyre was replaced - a different brand/type of tyre in the "same" size can often have significantly different rolling radius, enough to upset traction control / ABS. (Also different load ratings in the same size affect how much a tyre deflects under load and therefore alters the rolling radius)

Also the replacement tyre will be new with new tread depth, how does the tread depth compare on the remaining tyres ? Even a large difference in tread depth on the same kind of tyre can cause ABS/Traction control to trigger falsely as tread wear affects the rolling radius. Traction control and ABS trigger when discrepancies are detected in the rotational speed of the wheels outside of what would be expected from steering angle.

When I first got my Peugeot Ion the front left tyre was at about 1/4 tread depth, front right at about 1/2 tread depth (one replaced due to a puncture I presume) and when I put new tyres on the rear (increasing the discrepancy between front and rear) the traction control system started acting up similar to what you describe, falsely triggering when I took slight bends under acceleration. It was not until I replaced the mismatched tyres at the front that the problem went away.

So even a big difference in tread wear between different tyres (especially on the same axle) can cause problems.

If you search the forum you'll find that Kona's are also very sensitive to mismatched tyres on the same axle, to the degree that finding the closest match to the tyres that came on the car (which aren't available in the UK!) still causes issues, so owners have had to replace both tyres on the same axle when one was punctured to get a closer match.

One other possibility is an intermittent wheel speed sensor/cable but that is unlikely on a relatively young car.
 

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Discussion Starter #3
Hi. Both front were replaced at the same time as the other was getting close. So both front are one brand and both rear are lower tread and of the same brand (different to the front brand). We did think right at the start it could be the tyres. We have tried switching the new front to the rear and the rear to the front and still had the same issue.

It was our usual garage that kept telling us to sort trackingbtonfox the pulling to right on acceleration and the ABS (we've been going for years, but was taken over after our last MOT by a SanJong franchise)- this was after the MOT. It was the gent at the more local tyre/tracking place (not the ones who replaced things) that said it was something more than tracking and to get it checked out, hence a new recommended local garage- it's the first EV hes had in (a VW specialist), but just cant see the issue with the comps/visual checks.
 

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We had a similar problem, turned out to be the yaw sensor. It was intermittent at first, and then fairly constant. Replaced the sensor and all was good.

Ask your Nissan garage to do a full diagnosis on the stability system.

just ease the pain... the sensor is about £450, but it cured the problem.
 
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