Service bulletin ONL6BD06242021

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10198771
Published by NHTSA	2021-07-03
Manufacturer's number	ONL6BD06242021
Manufacturer's date	2021-06-24
NHTSA component	ENGINE AND ENGINE COOLING; POWER TRAIN

NHTSA's summary

Owner Notification Letter - Our records indicate that a EMISSIONS RECALL has not been completed on this vehicle (Vehicle Identification Number XXXXXXXXXXXXXXXXX). Under certain circumstances, your vehicle's powertrain control module (PCM) may not properly adjust the air-fuel ratio resulting in your vehicle releasing air pollutants which exceed California and Federal standards. In addition, your vehicle is equipped with an improperly functioning on-board emission-related diagnostic system that violates California and Federal standards and regulations.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Transmission and driveline

Vehicles listed
HONDA CIVIC	2012

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
2020610	2020-12-10. Powertrain
20V770000	2020-12-10. POWER TRAIN:DRIVELINE:DRIVESHAFT
12V256000	2012-06-04. POWER TRAIN:DRIVELINE:DRIVESHAFT
2012174	2012-06-01. Powertrain

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
ONLH9802252021	2021-03-02. Service bulletin. Owner Notification Letter - This warranty only covers vehicles that have a defective motor power inverter, also known as intelligent inverter unit. The motor power inverter may fail over time due to a defective solder joint. This failure will result in the charging system, PGM-FI system, and IMA system warning lights coming on. The decreased power supply to the 12-volt battery can lead to a series of system malfunctions.
ABOM12182020901	2021-01-05. Service bulletin. Dealer Message - Today, December 18, 2020, American Honda is announcing a warranty extension for certain 2012-2015 Civic Hybrid vehicles. This warranty extension covers the intelligent inverter unit (IIU) to address possible concerns of various warning lights turning on and diminishing electric motor power, braking or steering assistance control. American Honda is extending the warranty coverage of the IIU to 15 years from the original date of purchase or 150,000 miles, whichever comes first.
A20-030	2020-12-23. Service bulletin. "Service Bulletin - The Motor Power Inverter (MPI), also known as the Intelligent Inverter Unit (IIU), may fail over time due to a defective solder joint. This failure may result in one or more of the following DTC(s): -P1440 (MPI Module Output Circuit Malfunction) -P1437 (MPI Module Short Circuit) -P15A5 (Motor Current Sensor Circuit Malfunction) -P0A78 (MPI Module Internal Circuit Malfunction) -P0AE1 (Bypass Contractor Malfunction) -P0A3C (Motor Control Module (MCM) Overheating) -P0A3F (Motor Rotor Position Sensor Circuit Malfunction) -P0DA8 (MPI Module Voltage Malfunction) -P1634 (MPI Module Signal Circuit Malfunction) -P0AEE (MPI Internal Circuit Malfunction) -P0A27 (High Voltage Contactor Stays Activated) American Honda is extending the warranty coverage of the motor power inverter (MPI) on these vehicles to 15 years from the original date of purchase or 150,000 miles, whichever comes first."
ONL6BD10312019	2019-11-05. Service bulletin. Owner Notification Letter - Under certain circumstances, your vehicle's powertrain control module (PCM) may not properly adjust the air-fuel ratio resulting in your vehicle releasing air pollutants which exceed California and Federal standards. In addition, your vehicle is equipped with an improperly functioning on-board emission-related diagnostic system that violates California and Federal standards and regulations.
ABOM09242019	2019-10-03. Service bulletin. Dealer Message - Today, September 24, 2019, American Honda is announcing a stop sale and emissions recall for certain 2012 Civic vehicles that may be releasing air pollutants that exceed applicable state and federal standards.
A19-106	2019-10-03. Service bulletin. Service Bulletin - Due to an improper PCM calibration, after starting the engine the PCM cannot properly adjust the air-fuel ratio under certain conditions and the on-board emission-related diagnostic system may not appropriately detect a malfuction. As a result, vehicle emissions may exceed applicable emissions standards and the vehicle contains an improperly functioning on-board emission-related diagnostic system that violates applicable state and federal standards.
A17-023	2019-10-03. Service bulletin. Service Bulletin - Due to an improper PCM calibration, under certain conditions after starting the engine the PCM cannot properly adjust the air-fuel ratio. As a result, vehicle emissions may exceed applicable standards.
A18070	2018-09-04. Service bulletin. Service bulletin - Emission certification labels that were replaced on a small number of vehicles may have been replaced with a label listing incorrect information. The affected emission labels are replacement service parts, and were not installed at the factory; they were installed during postmanufacturing repairs that required replacement of the underlying part. This will cause the vehicle to be non-compliant with emissions regulations.
Service Bulletin	2018-06-11. Service bulletin. Service bulletin - The starter motor intermittently whines and does not crank the engine. The starter pinion does not extend far enough to properly engage the engine flywheel.
A12-069	2018-03-12. Service bulletin. Service bulletin - The oil consumption is more than the customer expects; the engine oil level is low on the dipstick sooner than expected based on overall vehicle usage, condition, and maintenance history. In some cases, the oil warning light may come on.