F87 rear differential error codes.

Mercules · 10-22-2023, 08:49 AM

Hi Guys,

Has anyone had experience of the rear axle differential lock warning with the error code 1B0A21?

1B0A66 - Rough Road Detection: No wheel speed signal received.

It is also accompanied by the Driving stabilisation error.

The issue popped up suddenly after being parked overnight. The day before only drove it to fill with fuel and it was not driven aggressively.

Replaced the rear speed sensor, cleared the codes, test drove around the block and same codes popped up.

Any advice would be greatly appreciated!

Thanks,
Jon

Mercules · 10-23-2023, 05:54 PM

Problem solved! Bad speed sensor, $30 part. Both rear wheels have one. Easy DIY.

Hopefully this helps someone.

Cheers

10-22-2023, 08:49 AM	#1
Mercules New Member 8 Rep 14 Posts Drives: 2017 OG M2 Join Date: Sep 2022 Location: Monroe, NC iTrader: (0)	F87 rear differential error codes. Hi Guys, Has anyone had experience of the rear axle differential lock warning with the error code 1B0A21? 1B0A66 - Rough Road Detection: No wheel speed signal received. It is also accompanied by the Driving stabilisation error. The issue popped up suddenly after being parked overnight. The day before only drove it to fill with fuel and it was not driven aggressively. Replaced the rear speed sensor, cleared the codes, test drove around the block and same codes popped up. Any advice would be greatly appreciated! Thanks, Jon
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10-23-2023, 05:54 PM	#2
Mercules New Member 8 Rep 14 Posts Drives: 2017 OG M2 Join Date: Sep 2022 Location: Monroe, NC iTrader: (0)	Problem solved! Bad speed sensor, $30 part. Both rear wheels have one. Easy DIY. Hopefully this helps someone. Cheers
	Appreciate 1 philth198.50 Quote