P0442 2017 Chevrolet Silverado Code - Evaporative Emission System Small Leak Detected
Quick Answer
The engine off natural vacuum test is the small leak detection diagnostic for the evaporative emission system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0442 2017 Chevrolet Silverado indicates Evaporative Emission System Small Leak Detected.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0442 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0442 2017 Chevrolet Silverado?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Leaking EVAP Canister
- Leaking EVAP System Hose
- Leaking Fuel Tank
- Faulty Fuel Tank Pressure Sensor
How to Fix the DTC P0442 2017 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there are seven critical connections that could likely lead to this DTC being set:
1. Purge tube to purge valve (at intake manifold)
2. Purge tube to chassis EVAP line (at the rear of the engine, near transmission)
3. Chassis EVAP line to canister (at canister)
4. Fuel tank load line to canister (at canister)
5. Vent valve line to vent valve (at vent valve)
6. Fuel tank load line jumper connection (near fuel tank)
7. Fuel tank cap is closed properly (at refuel compartment)
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 2017 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0442 2017 Chevrolet Silverado code?
Need more information on how to fix the P0442 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about P0442 2017 Chevrolet Silverado Code
1. What does OBDII code P0442 mean on a 2017 Chevrolet Silverado?
The code P0442 indicates that the Evaporative Emission System has detected a small leak.
2. What are the common symptoms of a P0442 code on a 2017 Chevrolet Silverado?
Common symptoms include the check engine light coming on, a slight fuel odor near the vehicle, and potential issues with passing emissions tests.
3. What are some possible causes of a P0442 code on a 2017 Chevrolet Silverado?
Potential causes include a loose or damaged gas cap, a leak in the EVAP system hoses, a faulty purge valve, or a cracked charcoal canister.
4. How serious is a P0442 code on a 2017 Chevrolet Silverado?
While a P0442 code is not an emergency, it should be addressed promptly to prevent potential issues with emissions, fuel economy, and overall vehicle performance.
5. Can I continue driving my 2017 Chevrolet Silverado with a P0442 code?
It is generally safe to drive the vehicle with a P0442 code, but it is recommended to have it diagnosed and repaired as soon as possible to avoid further problems.
6. How can I diagnose a P0442 code on my 2017 Chevrolet Silverado?
Diagnosing a P0442 code typically involves checking the gas cap for tightness, inspecting EVAP system hoses for leaks, testing the purge valve, and examining the charcoal canister for damage.
7. Can I repair a P0442 code on my 2017 Chevrolet Silverado myself?
Depending on the cause of the code, some DIY repairs may be possible, such as tightening or replacing the gas cap. However, more complex issues may require professional diagnosis and repair.
8. How much does it cost to fix a P0442 code on a 2017 Chevrolet Silverado?
The cost of fixing a P0442 code can vary depending on the specific cause of the issue. Simple fixes like replacing a gas cap may be inexpensive, while repairs involving parts replacement or system troubleshooting can be more costly.
9. Will a P0442 code reset itself on a 2017 Chevrolet Silverado?
In some cases, the P0442 code may reset itself after a few driving cycles if the issue was minor or temporary. However, it is recommended to have the code diagnosed and repaired to prevent recurring problems.
10. How can I prevent a P0442 code from recurring on my 2017 Chevrolet Silverado?
To prevent the P0442 code from coming back, make sure to always tighten the gas cap securely after refueling, perform regular maintenance on the EVAP system, and address any issues promptly to avoid leaks.
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