P1724 on the 2013 Audi A4 allroad

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.

Bulletins for this model year that name P1724
A371391 2032941-	2017-11-17. Service bulletin. Customer may report transmission warning light comes on. No drivability/starting concerns. GFF scan shows fault code: P172400 Starter Interlock Signal - short to Ground (GND) Sporadic, stored in the Transmission control module (02). Fault code: 00165 Transmission Park/Neutral Position Switch -F322- Incorrect Signal Sporadic, may also be stored in the Comfort module (46). Momentary loss of signal under very specific driving conditions causes fault to set.
A371303 2033653-	2017-11-17. Service bulletin. Customer may report transmission warning light comes on. No drivability/starting concerns. GFF scan shows DTC P172400 (Control Module Malfunctioning, Sporadic), stored in the transmission control module (TCM), J217 (02). DTC 00165 (Transmission Park/Neutral Position Switch -F322- Incorrect Signal Sporadic) may also be stored in the comfort system central control module, J393 (46). The entry is caused by an overly sensitive diagnosis in the TCM, due to an error in the engine control module (ECM), J623, software. This error does not affect the driving characteristics.
A021200 2031444-	2017-11-08. Service bulletin. Customer may report transmission warning light comes on. No drivability/starting concerns. GFF scan shows fault code- P172400 Starter Interlock Signal - short to Ground (GND) Sporadic, stored in the Transmission control module (02). Fault code- 00165 Transmission Park/Neutral Position Switch -F322- Incorrect Signal Sporadic, may also be stored in the Comfort module (46). Momentary loss of signal under very specific driving conditions causes fault to set.

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.