# Service bulletin B20\-039 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10180018 - Published by NHTSA: 2020\-09\-22 - Manufacturer's number: B20\-039 - Manufacturer's date: 2020\-09\-15 - NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:GEARS; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE ## NHTSA's summary "Service Bulletin \- When the PCM detects a malfunction in one of the odd number transmission gears, it will set one of the following DTCs: \-P073F \(unable to engage gear 1\) \-P074B \(unable to engage gear 3\) \-P074D \(unable to engage gear 5\) \-P074F \(unable to engage gear 7\) Due to inappropriate calibration of the PCM, the OBD system cannot properly clear the transmission permanent DTC as required." ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180018-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180018-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system, Equipment and accessories, Transmission and driveline, Automatic transmission, Software, Transmission control module ## Trouble codes named P073F, P074B, P074D, P074F ## Vehicles listed - 2017 to 2020 ACURA MDX SPORT HYBRID ## Other bulletins for the same vehicles and component - [BBOM01062023](/bulletins/10229689.md), 2023-01-11, Service bulletin: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Dealer Message \- During development, the idle stop enable criteria was mis\-set allowing idle stop to improperly engage while battery health is low. Under certain circumstances, after coming to a stop and engaging idle stop, the vehicle may not automatically restart. In most cases, the client can immediately restart the vehicle by selecting Park and pushing the Start button. - [B23\-002](/bulletins/10229688.md), 2023-01-11, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. Service Bulletin \- Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the client can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button. NOTE: If 23\-001 Product Update: PGM\-FI Idle Stop Software Update is applicable to the VIN, the PGM\-FI software must be updated first before the warranty extension applies. Acura is extending the warranty coverage for valve adjustment and starter replacement related to this condition to 10 years from the original date of purchase with no mileage limitation. - [B23\-001](/bulletins/10229687.md), 2023-01-11, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin \- Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button. - [BBOM09152020](/bulletins/10180020.md), 2020-09-22, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Dealer Message \- Today, September 15, 2020, Acura is announcing a stop sale and emissions recall for certain 2017\-2020 MDX Sport Hybrid and 2014, 2016\-2020 RLX Sport Hybrid vehicles that may not properly clear specific diagnostic trouble codes \(DTC\). Presence of these codes may prevent the vehicle from passing a smog test. Refer to your eResponsibility report or do an iN VIN status inquiry to determine which units in your inventory are affected. - [B20\-018](/bulletins/10173188.md), 2020-04-03, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Service Bulletin \- The Malfunction Indicator Lamp \(MIL\) may illuminate and set DTC P061B \(PCM internal malfunction torque calculation\). - [B20\-015](/bulletins/10172578.md), 2020-03-18, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Service Bulletin \- The transmission has intermittent harsh or jerky upshifts with steady acceleration, or the MIL comes on with DTC P0716 \(VNM Performance\). - [B19\-004](/bulletins/10152768.md), 2019-02-10, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. Service bulletin \- The transmission judders, shudders, or surges while driving. The transmission fluid has deteriorated prematurely. - [B17\-034](/bulletins/10129426.md), 2018-03-05, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Service bulletin \- The MIL comes on with DTC P0430 \(front bank catalyst system efficiency below threshold \[Bank 2\]\). The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. - [B17\-034](/bulletins/10119591.md), 2017-10-21, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Service bulletin \- The MIL comes on with DTC P0430 \(front bank catalyst system efficiency below threshold \[Bank 2\]\). The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. - [B17\-034](/bulletins/10118014.md), 2017-09-27, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; ENGINE. Service bulletin \- The MIL comes on with DTC P0430 \(front bank catalyst system efficiency below threshold \[Bank 2\]\). The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. JSON: [/v1/bulletins/10180018](/v1/bulletins/10180018) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20B20-039&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10180018&vehicle=Service%20bulletin%20B20-039)