Service bulletin A22-045

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	10224788
Published by NHTSA	2022-10-24
Manufacturer's number	A22-045
Manufacturer's date	2022-10-21
NHTSA component	ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING

NHTSA's summary

Service Bulletin - Sensors on the vehicle may have misinterpreted the catalyst as deteriorated. Update the PGM-FI software if P0420 is present.

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

Electrical system, Engine

Trouble codes named

P0420

Vehicles listed
HONDA CIVIC HYBRID	2014, 2015 (the catalog's model; the bulletin names a series or trim of it)

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

Other bulletins for the same vehicles and component
Label Misprint	2022-05-09. Service bulletin. Today, February 26, 2016, American Honda Motor Co., Inc. is announcing a Product Update for certain Accord, Civic, CR-Z, Fit, and Insight model years 2014-2016 vehicles for sale in the state of Hawaii to amend Monroney labels that were printed without bumper impact information. Basic Problem American Honda had a computer programming issue; an obsolete program name causing printing of no bumper impact information on the Monroney label for the state of Hawaii.
DLR-02-26-2016	2021-05-19. Service bulletin. Today, February 26, 2016, American Honda Motor Co., Inc. is announcing a Product Update for certain Accord, Civic, CR-Z, Fit, and Insight model years 2014-2016 vehicles for sale in the state of Hawaii to amend Monroney labels that were printed without bumper impact information. Basic Problem American Honda had a computer programming issue; an obsolete program name causing printing of no bumper impact information on the Monroney label for the state of Hawaii.
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."
A18090F	2018-10-15. Service bulletin. Servicenews article - Are any customers complaining about any of the following issues between their iPhone running iOS 12 when it's connected to their vehicle? ? You can't view or listen to videos, music, etc., when using a HDMI output. ? The launcher screen for HondaLink flickers or goes blank.
DLR MSG - RFV -	2018-03-12. Service bulletin. Dealer message - American Honda (AHM) is investigating certain 2014 Civics with a complaint of the TPMS light on and the VSA ?OFF? light on. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
DLR MSG - RFV -	2018-03-05. Service bulletin. Dealer message - American Honda (AHM) is investigating certain 2014 Civics with a complaint of the TPMS light on and the VSA ?OFF? light on. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
DLR MSG - RFV -	2018-03-05. Service bulletin. Dealer message - American Honda (AHM) is investigating certain 2014 Civics with a complaint of the TPMS light on and the VSA ?OFF? light on. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
Service Bulletin	2017-08-15. Service bulletin. Service bulletin - There is a chirping from the engine area while driving on rough roads in hot weather. The side engine mount's internal components are rubbing together, causing a noise.