Cat Engine Family Number Lookup

Posted By admin On 17.04.21

Please enter a valid serial number beginning with three alphanumeric characters followed by numeric characters (e.g.: XYZ01234). The serial number plate is typically found on the back of the engine block. The hp rating on your engine when shipped from factory was 355. It could of been uprated by now, I think the only way to find out what it is currently set at is to hook up to a computer. That data sticker you showed is something they put on every engine showing year it was produced and engine serial number. Enter a serial number into the Content for Serial Number (SN): field and then click on the grey arrow. Note: If you do not click on the arrow, your search will not work. Below is an example of results returned by a Serial Number search. The following fields display on the first grey line, based on your serial number.

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Download PDF Guide: Download PDF Family Plate Location Guide. The EPA engine family name is a 12 character number/letter designation included on the engine nameplate for all heavy duty truck engines sold in the United States. In general, the nameplate is permanently affixed to the engine.

Because vehicle manufacturers often use the same engine sizes in different models of the vehicles they produce the EPA has required engines be classified with an Engine Family Number. You may often encounter different model vehicles equipped with engines from the same engine family, or visa-versa... same model vehicle equipped with an engine from a different engine family. The engine family number (EFN) allows vehicle owners, aftermarket parts manufacturers, and automotive repair centers to identify an engine's exact specifications and its emissions control equipment. In this particular case, we're trying to find an aftermarket catalytic converter which is designed for use with your vehicle's particular engine family class. We must find a CAT which has been tested and approved for use specifically with your vehicle's engine EFN.
As far as the testing and approval process for aftermarket catalytic converters... the engine family number now becomes an identifier of a particular CAT seeking CARB approval. During this process, the EFN is used and referred to as a Test Group number. It's in fact the same EFN (no modification to the number) but because the catalytic converter is going through a test phase, the EFN of the engine which the CAT has been designed for is used as an identifier for the test and also as a reference for any vehicle owner seeking to purchase the CAT as a replacement. If an approved aftermarket catalytic converter test group number does not match a vehicle's engine family number, it may not be used in that vehicle as a replacement even if the component fits. An aftermarket CAT must posses a valid EO (executive order number) and must have been tested and approved for use with a specific engine family.
We would recommend contacting the State's Emissions Parts Hotline to get help locating an aftermarket catalytic converter for your vehicle. You may reach the states parts hotline at (800) 622-7733.

CARB Certification

California Installation Requirements

Effective January 1, 2009, new aftermarket catalytic converters sold or installed in California must be designed to meet the following requirements:

Aftermarket converters are required to last for 5 years/50,000 miles.
Aftermarket converters for newer vehicles must be compatible with OBD II catalyst monitors. This includes making sure converters won't cause false catalyst fault codes, while also making sure that the OBD II system will correctly set a catalyst fault code if the aftermarket converter fails.
The warranty must be for 5 years/50,000 miles and cover the cost of parts and labor if a replacement is needed. Determining the proper replacement converter for a particular vehicle takes a little research. This catalog will specifically indicate which converter models are legal for use in California and which exact vehicle models they may be installed on.

Service Provider’s Checklist for New Aftermarket Catalytic Converters

The vehicle's emissions warranty for the OE converter has expired. Warranties range from 7 years/70,000 miles to 15 years/150,000 miles. Consult the owner's manual for details.
The service provider has confirmed the need for a replacement catalytic converter. If the OEM converter is still present, a diagnosis that it is malfunctioning is required.
The vehicle is specifically included in the application list for the catalytic converter, and the converter is legal for use in California.
The replacement converter is installed in the same location as the OE converter (the front face location will be within three inches compared to the OE).
All oxygen sensors will remain installed in their OE location(s).
The catalytic converter is installed on a 'one-for-one' basis (a new converter is installed for each OE converter being replaced). Decreasing or increasing the number of catalytic converters (compared to the OE configuration) is prohibited.
The Converter Warranty Card is completed– The Service Provider must:
- Fill out the warranty card
- Obtain the customer's signature on the card
- Give the original to customer
- Attach a copy to the original repair invoice
- Return the pre-paid postage copy of the warranty card to the catalytic converter manufacturer
- The service provider must file and maintain a copy of all documentation for a period of at least four years from the date of installation

ATTENTION: Under California regulations, it is illegal to install a catalytic converter based solely on physical shape, size, configuration or pipe diameter. See the Walker CalCat catalog application section for specific part numbers for a specific vehicle.

Cat Engine Family Number Lookup By Vin

Search by Executive Order Number

Search California Air Resource Board's Aftermarket Converter Database by vehicle or by executive order number with this handy search tool.

Engine Family Number

In order to determine which catalytic converter to use on a vehicle application, it may be necessary to verify the specific vehicle emissions system that was installed by the Original Equipment Manufacturer. This information is included on the Vehicle Emission Control Information (VECI) label required by the United States Environmental Protection Agency (see examples below). This label is located in the engine compartment in a visible position on the hood underside, shock tower, radiator support, fan shroud or firewall.

The label will provide the Engine Family Number (EFN, also known as the Emission Family Code or Test Group Number) and other important emissions specifications. All OBDII applications in this catalog refer to the EFN. Be sure to verify your EFN to avoid misapplication of the catalytic converters in this catalog. If the label is missing, it will be necessary to contact the OE dealer for the information, or to order a new Emission Control Information Label.

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Cat Engine Family Number Lookup Reverse

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