P0497 on Toyota vehicles
EVAP Low Purge Flow — what it means on a Toyota, whether it's safe to drive, and the fixes by model and year.
P0497 on a Toyota means evap low purge flow. Most vehicles stay drivable short-term, but diagnose it promptly. The most common cause is failed purge valve stuck closed (mechanical or coil failure) (typically $80–$300). Pick your Toyota model below for its known failure patterns, recalls, and TSBs.
What does P0497 mean on a Toyota?
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.
P0497 is a standardized OBD-II code, so its definition is the same on every Toyota. What differs by model and engine is which cause is most likely — pick your Toyota model below for a diagnosis tuned to its known failure patterns, recalls, and TSBs.
Is it safe to drive a Toyota with P0497?
In most cases a Toyota 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. Exact tolerance depends on the model and engine.
What causes P0497 on a Toyota?
| 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 |
Repair costs are typical US ranges and vary by Toyota model, model year, and labor rate. A diagnostic trouble code is a symptom, not a guaranteed failed part — confirm the root cause before replacing anything.
P0497 by Toyota model
Select your Toyota model and year for a P0497 diagnosis tuned to that vehicle's failure patterns, recalls, and TSBs.
Toyota RAV4
691 NHTSA owner complaints · 9 recalls on record across the years covered below.
Toyota Camry
842 NHTSA owner complaints · 6 recalls on record across the years covered below.
Toyota Corolla
721 NHTSA owner complaints · 8 recalls on record across the years covered below.
Toyota Tacoma
583 NHTSA owner complaints · 15 recalls on record across the years covered below.
Toyota 4Runner
170 NHTSA owner complaints · 16 recalls on record across the years covered below.
Toyota Highlander
650 NHTSA owner complaints · 11 recalls on record across the years covered below.
Toyota Sienna
393 NHTSA owner complaints · 22 recalls on record across the years covered below.
Complaint and recall counts are NHTSA totals for the model years covered on this site, not counts specific to P0497.
P0497 on other makes
Other codes on Toyota vehicles
P0497 on a Toyota: frequently asked questions
What does diagnostic trouble code P0497 mean on a Toyota?
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. P0497 is a standardized OBD-II code, so the definition is the same on every Toyota — which cause is most likely varies by model and engine.
What are the symptoms of P0497 on a Toyota?
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 Toyota?
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 Toyota with P0497?
In most cases a Toyota 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. Exact tolerance depends on the model and engine.