What the CA9948 Pollution Endorsement Is
The CA9948 pollution endorsement is a restriction code that appears on your California commercial driver's license. It means you are not permitted to operate any commercial motor vehicle that is not equipped with a functioning smog control device or that does not meet current California emissions standards. This endorsement does not give you permission to do something — it limits what you can drive.
California adds this code to your CDL when you fail an emissions inspection or when you attempt to renew your license and your vehicle does not pass the state's smog requirements. Once the code is on your license, you cannot legally operate a commercial vehicle for hire or business purposes unless that vehicle has passed its emissions test and meets the state's pollution control standards.
The endorsement stays on your record until you demonstrate that you have access to a compliant vehicle or until you meet the conditions California sets for its removal. It is specific to California and does not transfer to other states.
Key Takeaways
- CA9948 is a restriction, not a permission — it prohibits you from driving commercial vehicles that do not meet California's emissions standards.
- The code appears on your CDL after an emissions test failure or when your vehicle does not pass smog inspection during renewal.
- You cannot legally operate a commercial motor vehicle for business purposes while this restriction is active unless the vehicle is emissions-compliant.
- Removal requires either passing an emissions inspection with a compliant vehicle or meeting other conditions set by the California Department of Motor Vehicles (DMV).
- This restriction is California-specific and does not affect your CDL privileges in other states, though it may limit your ability to work across state lines if your employer requires a clean record.
How You Get the CA9948 Code on Your License
The CA9948 code is added to your CDL in two main situations. The first is when you fail a smog inspection — either during your initial CDL process or during a renewal. California requires all commercial vehicles to pass an emissions test before the owner can renew their registration. If the vehicle fails, the DMV will not issue or renew your commercial license without restrictions.
The second situation is when you renew your CDL and the vehicle you list on your process does not have current, passing emissions documentation. Even if you have not yet taken the vehicle for inspection, the DMV may add the restriction preemptively to prevent you from driving a non-compliant vehicle commercially.
Some drivers also receive this code if they are cited for operating a commercial vehicle without proper emissions equipment or if they are caught driving a vehicle that has been flagged as a gross polluter by the California Air Resources Board (CARB).
What You Cannot Do With CA9948 on Your License
With the CA9948 restriction active, you cannot operate any commercial motor vehicle for business, hire, or compensation unless that vehicle has a current, passing smog inspection certificate. This includes driving for an employer, operating your own commercial vehicle, or driving a company truck or bus.
The restriction applies to all commercial vehicles — trucks, buses, tractor-trailers, and any other vehicle requiring a CDL. It does not matter whether the vehicle belongs to you, your employer, or a third party. If you are behind the wheel of a commercial vehicle and the CA9948 code is on your license, that vehicle must be emissions-compliant.
If you are caught driving a non-compliant commercial vehicle with this restriction on your license, you face a citation, fines, and potential suspension of your CDL. Your employer could also face penalties for allowing you to operate a vehicle while restricted.
How to Remove the CA9948 Restriction
To remove the CA9948 code, you must demonstrate that you have access to a commercial vehicle that passes California's emissions inspection. The most direct path is to have your vehicle tested and certified by a smog check station. Once the vehicle passes, you receive a smog inspection certificate. You then take that certificate to the California DMV along with your CDL and a renewal process.
The DMV will review your documentation and, if everything is in order, will issue a new CDL without the CA9948 restriction. The timeline depends on how quickly you can schedule a smog inspection and how busy your local DMV office is. Smog checks typically take one to two hours and cost between $30 and $80, depending on your vehicle type and the testing station.
If you do not own a commercial vehicle or cannot access one for testing, some drivers work with their employer to use a company vehicle for the inspection, or they may need to purchase or lease a compliant vehicle before they can continue working commercially in California.
CA9948 and Your Employment
If you work as a commercial driver and the CA9948 code appears on your license, you must tell your employer when ready. Many commercial driving jobs require a clean CDL record, and operating a vehicle while restricted violates both California law and most employment agreements. Your employer could terminate you for driving while restricted, and you could face legal liability if you are involved in an accident.
Some employers may allow you a grace period to resolve the restriction — typically 30 to 60 days — while you arrange for a vehicle inspection. Others may require you to remove the code before you return to work. If you are self-employed or own a small fleet, you will need to may support all your vehicles pass inspection before you can legally operate them commercially.
If you are looking for work and have the CA9948 code on your license, many trucking companies and transportation employers will not hire you until the restriction is removed. It is worth addressing this issue as quickly as possible if you depend on commercial driving for income.
The Difference Between CA9948 and Other CDL Restrictions
California uses several restriction codes on CDLs, and it is important not to confuse CA9948 with others. The CA9948 code is specifically about emissions compliance. Other codes address different issues — for example, CA9968 restricts you from driving certain types of vehicles, and CA9970 relates to medical certification status.
Some restrictions are temporary and lift automatically once a condition is met (like a medical certification expiring). The CA9948 code, however, remains on your license until you actively remove it by providing proof of an emissions-compliant vehicle. It does not expire on its own.
If you are unsure which restrictions are on your license or what they mean, you can check your CDL document itself — restrictions are listed in a specific section — or contact your local California DMV office for clarification.
Frequently Asked Questions
Can I drive a personal vehicle while CA9948 is on my commercial license?
Yes. The CA9948 restriction applies only to commercial motor vehicles. You can drive a personal car, truck, or motorcycle with a regular driver's license. The restriction does not affect your ability to drive for personal use.
What if my employer's vehicle fails the smog test?
Your employer must have the vehicle repaired to meet emissions standards and then pass a new smog inspection before you can legally drive it. You cannot operate it commercially while it is non-compliant, even if your employer tells you to. If you are unsure whether a vehicle is compliant, ask your employer for the current smog inspection certificate.
How long does it take to remove CA9948 after I pass a smog inspection?
Once you have a passing smog inspection certificate, you can visit the DMV to renew your CDL and remove the restriction. Processing time varies by location, but you can typically expect your new license within two to four weeks if you explore in person. Some DMV offices offer expedited processing for an additional fee.
Does CA9948 show up on my driving record in other states?
No. The CA9948 code is specific to California and appears only on your California CDL. However, if you move to another state or work across state lines, you may need to transfer your CDL, and the new state may see the restriction in the Commercial Driver's License Information System (CDLIS). Some employers require a clean national record, so it is worth resolving the issue before relocating.
Can I get the restriction removed without owning a vehicle?
You need to demonstrate access to a compliant vehicle for the smog inspection, but you do not need to own it. You can use an employer's vehicle, a family member's vehicle, or a rental vehicle that meets California emissions standards. The vehicle must be registered in California and have a current smog inspection certificate.