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The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 03-29-2018, 07:15 PM   #1
maddog1001
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Help.... smg......not another smg thread....

Can anyone help. The problem is simple. Though the car (2002 coupe with 63000 miles) is running and driving great the gear selection indicator in the dash keeps flashing and, without either brake or throttle input, the car drops into neutral after a couple of seconds. Like I say the car drives fine. If I push hard the gear cog illuminates yellow but still you wouldnít know there was a problem.

Iíve searched and searched for answers. The most common suggestion is the salmon relay so I swapped it with the one behind the glove box and, when that didnít fix it, bought a new one from the stealership. Second in the list was the bonnet sensors. At first glance that looked like the problem as (according to bmw education info for mechanics) with one sensor down the symptoms Iím experiencing fit the bill but if both sensors are open the car shouldnít engage gear. Simple test, I popped the bonnet and put the car in gear ... exactly the same as bonnet shut:

Anyone got any ideas?
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Old 03-30-2018, 12:03 AM   #2
mrgizmo04
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Check or post on m3forum.net

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Old 03-30-2018, 03:30 AM   #3
Commando
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Since you've done the research you know these cars tell you what they think is wrong. Whats it saying?
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Old 03-31-2018, 08:34 PM   #4
maddog1001
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Cheers for the suggestion re m3forum ***55357;***56832;.

Regarding what it's telling me.... I don't have access to laptop/software to read specific smg codes. I have a standard obd reader but that's reading no faults. As I outlined above the likely culprit is a bonnet sensor however realistically the only way that can be the case is if one sensor has been bypassed by a previous owner. As the bonnet sensors appear quit awkward to remove I thought I would ask the question........
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Old 03-31-2018, 08:59 PM   #5
armenh7
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Buy a $15 inpa cable off of eBay
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Old 04-01-2018, 02:50 PM   #6
maddog1001
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Thanks for the heads up re inpa cable. Ordered one today ***55357;***56832;
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Old 04-04-2018, 04:50 AM   #7
maddog1001
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Update ..... took her to my local indi for fuel filter thinking I'll get him to have a look at the computer (my inpa cable has yet to arrive) and guess what - the dash has stopped flashing and the gear selection is normal! So the solution seems to be to park her up and use the x5 for a couple of days. Makes me think of Christine.......
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Old 04-17-2019, 07:21 PM   #8
Cncnjn
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Originally Posted by maddog1001 View Post
Update ..... took her to my local indi for fuel filter thinking I'll get him to have a look at the computer (my inpa cable has yet to arrive) and guess what - the dash has stopped flashing and the gear selection is normal! So the solution seems to be to park her up and use the x5 for a couple of days. Makes me think of Christine.......
Mine does this but issue always comes back. I hope yours is different!
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