P0497 on a 2022 Chevrolet Silverado 1500
EVAP Low Purge Flow
P0497 on a 2022 Chevrolet Silverado 1500 indicates evap low purge flow. It usually stays drivable short-term but should be diagnosed promptly. The most common cause is failed purge valve stuck closed (mechanical or coil failure) (typically $80–$300). Confirm the root cause before replacing parts.
What does P0497 mean on a 2022 Chevrolet Silverado 1500?
P0497 is the inverse of P0496. The ECM commands the EVAP purge valve to flow vapor from the canister into the intake during a monitor test, and detects less flow than expected — or none at all. The cause is either the purge valve stuck closed, a restricted hose between the canister and the intake, a clogged charcoal canister, or the purge valve electrical circuit failing open.
This guide covers P0497 across the 2020-2024 Chevrolet Silverado 1500 generation — the symptoms, causes, and diagnostic steps below apply to every model year from 2020 through 2024.
Is it safe to drive a 2022 Chevrolet Silverado 1500 with P0497?
In most cases a 2022 Chevrolet Silverado 1500 stays drivable for short trips with P0497 active, but diagnose and repair it promptly. This is a low-severity code — ignoring it can lead to further damage or a failed emissions test.
What are the symptoms of P0497 on a 2022 Chevrolet Silverado 1500?
- Check Engine Light is illuminated
- Vehicle will fail emissions / smog testing
- Rarely any drivability symptom
- Possible faint fuel smell from a saturated canister
- Difficulty fueling at the pump (gas pump clicks off repeatedly)
What causes P0497 on a 2022 Chevrolet Silverado 1500?
| Cause | Likelihood | Estimated repair (USD) |
|---|---|---|
| Failed purge valve stuck closed (mechanical or coil failure) | Most common | $80–$300 |
| Restricted or pinched hose between canister and purge valve | Common | $20–$150 |
| Wiring open on the purge valve circuit | Common | $80–$350 |
| Blocked or saturated EVAP charcoal canister | Occasional | $200–$600 |
| Failed PCM driver for the purge valve circuit | Rare | $400–$1,500 |
| Damaged or clogged EVAP service port creating a false low-flow reading | Rare | $30–$150 |
How to diagnose this on a 2022 Chevrolet Silverado 1500
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Bench-test the purge valve
Remove the purge valve and apply 12 V. The valve should click audibly open. With voltage applied, blow air through the valve — air should pass freely. Without voltage, the valve should seal. A valve that does not open when commanded is the textbook P0497 cause.
Tools: 12 V test source, Hand vacuum / pressure pump
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Verify the purge valve receives voltage during commanded operation
Use a bidirectional scan tool to command the purge valve open while back-probing the connector. Battery voltage should appear on the power wire when commanded. No voltage = open circuit, blown fuse, or PCM driver fault.
Tools: Bidirectional scan tool, Multimeter, Back-probe pins
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Inspect the purge line for kinks or blockage
Trace the rubber line from the canister to the purge valve to the intake. Look for pinched sections (especially where the line passes under brackets), collapsed inner walls (common on aged rubber), or visible damage. A blocked line sets P0497 even with a perfect valve.
Tools: Flashlight, Inspection mirror
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Test the charcoal canister
Disconnect the purge-side hose from the canister and try to pull vacuum on it with a hand pump. A healthy canister allows some airflow; a saturated canister blocks airflow entirely. If the canister won't pass air, replace it.
Tools: Hand vacuum pump
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Read mode 6 EVAP test results
Mode 6 shows the measured purge flow during the most recent monitor run. Zero or very low flow confirms the diagnosis. A threshold-failure (just below acceptable) with a working valve points more at canister or hose restriction.
Tools: Scan tool with mode 6 support
NHTSA complaints & recalls for the 2022 Chevrolet Silverado 1500
Owner-reported safety complaints and official recalls filed with the U.S. National Highway Traffic Safety Administration for the 2022 Chevrolet Silverado 1500. Use these to gauge how common a problem is on your specific vehicle before you start chasing Chevrolet Silverado 1500 diagnostics.
- ENGINE 204
- POWER TRAIN 145
- ELECTRICAL SYSTEM 120
- UNKNOWN OR OTHER 55
- SERVICE BRAKES 54
6 active recalls
- EXTERIOR LIGHTING:BRAKE LIGHTS Jun 2022
General Motors (GM) has decided that certain 2022 model year Chevrolet Silverado, and GMC Sierra vehicles equipped with an accessory sport bar. The accessory sport bar contains a high-mounted brake light that may not function. In addition, it may block the vehicle's existing hi…
NHTSA campaign 22V463000 - AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE Nov 2022
General Motors, LLC (GM) is recalling certain 2022 Chevrolet Silverado 1500 vehicles. The sensing diagnostic module (SDM) was left in manufacturing mode and not activated at the assembly plant prior to shipment. As such, these vehicles fail to comply with the requirements of Fe…
NHTSA campaign 22V873000 - EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE Dec 2022
General Motors, LLC (GM) is recalling certain 2020-2023 Cadillac CT4 and CT5; 2021-2023 Buick Envision; and 2022-2023 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The daytime running lights (DRLs) m…
NHTSA campaign 22V903000 - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE Oct 2024
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control val…
NHTSA campaign 24V797000
How do I fix P0497 on a 2022 Chevrolet Silverado 1500?
- Replace the EVAP purge valve / purge solenoid
- Repair pinched or collapsed EVAP hose
- Replace the EVAP charcoal canister if saturated
- Repair open or broken purge valve wiring
About the 2020-2024 Chevrolet Silverado 1500
The 2020-2024 Chevrolet Silverado 1500 was commonly sold with the following powertrains: 5.3L V8, 6.2L V8, 2.7L Turbo I4. Common trims include WT, LT, RST, LTZ, High Country.
P0497 vs P0496
These are the two opposite EVAP purge flow failures:
- P0496 — high purge flow / valve stuck open. Vapor flows into the intake when it shouldn’t. Often causes rough idle.
- P0497 — low purge flow / valve stuck closed. Vapor cannot reach the intake to be burned. The canister gradually saturates, fuel pump can have trouble refueling because the tank can’t vent through the purge path.
Both codes can come from the same physical part — purge valves fail open or closed about equally. Don’t assume the valve diagnoses to one direction over the other.
The “tank doesn’t vent on refuel” symptom
If P0497 sets and the gas pump keeps clicking off during refueling, the EVAP system can’t vent the displaced air from the tank through its normal path. This is mostly a refueling annoyance — it doesn’t affect drivability. But it’s a strong diagnostic clue when present.
Restricted hoses on aged rubber
EVAP hoses, especially the small-diameter rubber sections between the canister and the purge valve, harden and shrink over 10+ years. The inner wall can delaminate and partially block flow even when the outer hose looks fine. If P0497 returns after a valve replacement, swap the hose too — they aged at the same rate.
P0497 on a 2022 Chevrolet Silverado 1500: frequently asked questions
What does diagnostic trouble code P0497 mean on a 2022 Chevrolet Silverado 1500?
P0497 is the inverse of P0496. The ECM commands the EVAP purge valve to flow vapor from the canister into the intake during a monitor test, and detects less flow than expected — or none at all. The cause is either the purge valve stuck closed, a restricted hose between the canister and the intake, a clogged charcoal canister, or the purge valve electrical circuit failing open.
What are the symptoms of P0497 on a 2022 Chevrolet Silverado 1500?
Check Engine Light is illuminated. Vehicle will fail emissions / smog testing. Rarely any drivability symptom. Possible faint fuel smell from a saturated canister. Difficulty fueling at the pump (gas pump clicks off repeatedly)
What causes P0497 on a 2022 Chevrolet Silverado 1500?
Failed purge valve stuck closed (mechanical or coil failure) (most-common). Restricted or pinched hose between canister and purge valve (common). Wiring open on the purge valve circuit (common). Blocked or saturated EVAP charcoal canister (occasional). Failed PCM driver for the purge valve circuit (rare). Damaged or clogged EVAP service port creating a false low-flow reading (rare)
Is it safe to drive a 2022 Chevrolet Silverado 1500 with P0497?
In most cases a 2022 Chevrolet Silverado 1500 stays drivable for short trips with P0497 active, but it should be diagnosed and repaired promptly — this is a low-severity code. Ignoring it can lead to further damage or a failed emissions test.