# Service bulletin A20\-117

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: 10184330
- Published by NHTSA: 2020\-12\-19
- Manufacturer's number: A20\-117
- Manufacturer's date: 2020\-12\-09
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's summary

Service Bulletin \- The vehicle may not start upon first press of the ENGINE START/STOP button. Also, MID displays the error message KEYLESS START SYSTEM ERROR, and DTC B12C5 \(Engine Start/Stop Switch Failure\) is stored. American Honda is extending the warranty for the keyless start system on these vehicles to 9 years from the original date of purchase or 125,000 miles, whichever comes first.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10184330-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10184330-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine, Equipment and accessories

## Trouble codes named

B12C5

## Vehicles listed

- 2016 to 2017 HONDA PILOT
- 2017 HONDA RIDGELINE

## Recalls for the same vehicles and component

- [23V751000](/recalls/nhtsa/23V751000.md), 2023-11-13: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [2023603](/recalls/tc/2023603.md), 2023-11-08: Engine
- [2020441](/recalls/tc/2020441.md), 2020-09-17: Accessories
- [16V888000](/recalls/nhtsa/16V888000.md), 2016-12-09: ELECTRICAL SYSTEM:WIRING
- [2016612](/recalls/tc/2016612.md), 2016-12-08: Electrical
- [15V668000](/recalls/nhtsa/15V668000.md), 2015-10-16: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## Other bulletins for the same vehicles and component

- [ATI\&03262026905](/bulletins/11030674.md), 2026-04-03, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [ATI\&03112026902](/bulletins/11030074.md), 2026-03-16, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [ATI\&02242026902](/bulletins/11029281.md), 2026-03-03, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [ATI\&01052026901](/bulletins/11027802.md), 2026-01-27, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [ATI\&10232025902](/bulletins/11024908.md), 2025-11-04, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [ATI\&10142025904](/bulletins/11024886.md), 2025-11-04, Other: ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2019 Ridgelines with a customer complaint of the rearview camera inoperable. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [A23\-009](/bulletins/11020578.md), 2025-07-09, Service bulletin: ENGINE. 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 customer can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button.
- [A23\-078](/bulletins/11019252.md), 2025-06-05, Service bulletin: ENGINE. Service Bulletin \- Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock\-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock\-up piston. The reduced lock\-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
- [A23\-078](/bulletins/11019241.md), 2025-06-05, Service bulletin: ENGINE. Service Bulletin \- Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock\-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock\-up piston. The reduced lock\-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
- [A23\-078](/bulletins/11017326.md), 2025-04-29, Service bulletin: ENGINE. Service Bulletin \- Torque converters may not have been manufactured to proper specifications. As a result, the lock\-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock\-up piston. The reduced lock\-up clutch capacity results in the transmission indicator flashing “D” and set the DTC P0741 Torque Converter Clutch Performance or Stuck OFF.

JSON: [/v1/bulletins/10184330](/v1/bulletins/10184330)

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