U129D on the 2018 Acura TLX
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| BPaS05102018903 | 2018-07-16. Service bulletin. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2015-2018 TLX 2WDs with a client complaint of Malfunction Indicator Lamp (MIL) on with DTC U129D (Lost Communication with the Precision All Wheel Steer Control Unit) stored. Client may experience limited speed of up to 50mph or the steering wheel not centered. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
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| BPaS04232018903 | 2018-05-14. Service bulletin. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2015-2018 TLX 2WDs with a client complaint of Malfunction Indicator Lamp (MIL) on with DTC U129D (Lost Communication with the Precision All Wheel Steer Control Unit) stored. Client may experience limited speed of up to 50mph or the steering wheel not centered. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| BPaS04062018901 | 2018-04-23. Service bulletin. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2015-2018 TLX 2WDs with a client complaint of Malfunction Indicator Lamp (MIL) on with DTC U129D (Lost Communication with the Precision All Wheel Steer Control Unit) stored. Client may experience limited speed of up to 50mph or the steering wheel not centered. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.