ABS MSP

Sparks

Junior Member
Messages
60
After 3 years off the road due to medical issues, it looks like I might get back to driving soon.
However, my 4200 has the ABS and MSP lights on.
Any tips on how to get them off? I can’t find a garage in the area with a suitable computer and with the lights in it won’t pass the MOT.
At this stage I would happily buy a cheap diagnostic unit from eBay if I thought it would do it for the time being.
 

safrane

Member
Messages
16,749
Suspect you may have an issue with rust or other matter on the hub sensors etc given the time the car has sat... I would have thought the error would go after a clean rather than a reset.
 

Zep

Moderator
Messages
9,110
Where about are you located? A few people around the country could help you with diagnostic tools. Or search for Autel, some people have used those with some success. The best method is to read the codes and then deal with what it says.
 

Sparks

Junior Member
Messages
60
Where about are you located? A few people around the country could help you with diagnostic tools. Or search for Autel, some people have used those with some success. The best method is to read the codes and then deal with what it says.
I’m in West Oxfordshire,
Regarding the Autel unit, is there any recommendations on which model?
 

jebroni

Member
Messages
130
Like a few on here I’ve used the AP200 & off the top of my head I’m sure it will check abs
 

Sparks

Junior Member
Messages
60
Suspect you may have an issue with rust or other matter on the hub sensors etc given the time the car has sat... I would have thought the error would go after a clean rather than a reset.
How much stripping down is needed to access the hub sensors?
 

safrane

Member
Messages
16,749
I don't believe they can be stripped, but others may have a better idea (no good with spanners and I always send mine to the garage for any fixes)
 
Messages
1,117
I had the same issue. It turned out that with low usage one wheel sensor needed to be replaced when a reset with SD diagnostics failed.

It is a unitary sensor and wheel bearing in one. Luckily mine was a front sensor on the Gransport and there is only about an hour of labour (more so for the rear sensors).

The new wheel sensor and bearing for the GS ain't cheap. So be prepared for that shock.

I don't advise to look for a used part either - many of these cars are low mileage and not used daily. This issue is often confirmation of low usage. Hence a used part could fail early versus a brand new Maranello- supplied part.
 

nfm

Member
Messages
856
My ABS MSP issue also was linked to a failed bearing sensor. A good code reader will identify which wheel. During the problem the rev limiter kicked in at about 4k rpm.
 
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Zep

Moderator
Messages
9,110
My ABS MSP issue also was linked to a failed bearing sensor. A good code reader will identify which wheel. During the problem the rev limiter kicked in at about 4k rpm.

This happened when mine failed. I assumed it was because it was a rear bearing.
 

conaero

Forum Owner
Messages
34,594
Fronts are easy 1-2hrs done but the rears are a pig as the driveshaft has to be released to access a stupid P clip so 4hrs is a good time for one of these.

The best way I have found to confirm diagnosis is to drive in a straight line with live diagnostics showing all 4 wheel sensor speeds as low battery mimics some symptoms. I have also seen sensors that only fail in reverse so that needs checking too.

From experance, the failed corner will show no speed, half speed or double speed of the other three corners.

A word of warning, some diagnostic machines get the Maserati obd codes wrong left to right meaning they say it’s front left when actually it’s front right.

Just to be sure, spin both wheels of the axle to confirm the failure.

You can, while driving and monitoring turn left and right as the outside wheel will increase in speed and the inside wheel reduce.
 

Zep

Moderator
Messages
9,110
No, it could still be a bearing, you don’t always get the lower rev limit.
 

Sam McGoo

Member
Messages
1,746
Were the lights on before it was off the road for three years?

If not, I'd start with a new battery and a good long drive.

If it remains, then start looking at the wheel sensors.