Service bulletin N202304540
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 | 10177356 |
| Published by NHTSA | 2020-07-20 |
| Manufacturer's number | N202304540 |
| Manufacturer's date | 2020-06-08 |
| NHTSA component | ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; EQUIPMENT:ELECTRICAL |
NHTSA's summary
Emissions Recall. General Motors has decided to conduct a voluntary emissions recall involving certain vehicles. The engine control module (ECM) in these vehicles may not be able to properly diagnose reduced efficiency issues within the catalytic converter. If the catalytic converter?s efficiency would become reduced, tailpipe emissions could exceed acceptable standards without illuminating the Malfunction Indicator Lamp (Check Engine Light). Dealers are to reprogram the ECM.
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, Equipment and accessories, Exhaust and emissions, Catalytic converter
| CHEVROLET EXPRESS | 2018 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| PIP3119P | 2019-04-08. Service bulletin. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. |
|---|---|
| 060601010D | 2018-06-04. Service bulletin. This informational bulletin explains how the catalytic converters may need an inspection, cleaning or replacement if debris have entered the exhaust system. |