P0497 OBD-II Trouble Code: Evaporative Control System Malfunction

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0497 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0497 code

P0497 is a diagnostic trouble code (DTC) for "Evaporative Control System Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0497 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0497 OBD-II Trouble Code: Evaporative Control System Malfunction

Diagnostic Trouble Code (DTC): P0497

P0497 code definition

The P0497 code, or Evaporative Emission System Low Purge Flow, is indicative of a problem somewhere in the EVAP control system.

What the P0497 code means

When a vehicle sets the P0497 code, it lets you know that there is a fault in the evaporative control system, the system which helps to regulate the amount of fuel vapor that is released into the environment. As the engine runs and fuel is burned, a canister in the EVAP control system stores the excess fuel vapors coming from the gas tank.

The pressure that is built up through this process is vented through a vent line and EVAP vent solenoid, and the vapors are stored in the canister until the engine uses them up. If there is a leak or other fault in the system, the pressure of these products is affected, and the PCM (powertrain control module) will detect a difference in the pressure level. Code P0497 is detected when there is a change in the way this pressure normally flows.

What causes the P0497 code?

There are several components in the EVAP control system which could trigger a vehicle to throw this code, including:

  • An ill-fitting gas cap
  • A short in the EVAP canister vent valve wiring harness
  • A clogged EVAP charcoal canister
  • A faulty EVAP canister vent valve
  • A compromised connection in the canister vent valve circuit
  • A faulty pressure sensor
  • Damaged or disconnected vacuum or fuel vapor hoses

What are the symptoms of the P0497 code?

There may not be any discernible symptoms with this code, beyond an illuminated Check Engine light. However, any EVAP malfunction can affect fuel economy as well as emissions released by the vehicle, which could cause you to fail an emissions test.

How does a mechanic diagnose the P0497 code?

Procedures required to pinpoint an EVAP purge flow problem may include:

  • Recording stored codes and freeze frame data with a scanner, and clearing those codes from the vehicle’s memory to see if they return
  • Visual inspection of the charcoal canister, purge valve, hoses, wiring, and connections
  • Starting the engine and listening for vacuum leaks at the purge control valve and hose
  • Using a smoke machine to reveal leaks among the network of hoses that make up the EVAP system
  • Performing a resistance check on the purge control solenoid and surrounding components

Common mistakes when diagnosing the P0497 code

Because the gas cap is such a simple fix in EVAP purge flow problems, it is often overlooked as a culprit in this code. Checking each possibility, no matter how minor, can help prevent unnecessary and costly repairs.

How serious is the P0497 code?

While the vehicle will typically run with this code, it can cause a drop in fuel efficiency and an increase in emissions released into the atmosphere. It’s best to have the issue addressed as soon as possible.

What repairs can fix the P0497 code?

Repair procedures for this code depend upon what is found by the diagnostic process, and may include:

  • Reconnection of hoses or loose connectors
  • Wiring replacement
  • Vacuum
  • Charcoal canister replacement
  • Canister purge valve replacement
  • Gas cap replacement
  • Clearing of codes and retesting with a scanner to ensure the problem is fixed

Additional comments for consideration regarding the P0497 code

Even if hoses aren’t damaged or disconnected, they may become kinked, so your technician should check for this issue. When performing a smoke machine test on the system to check for leaks, it is normal for a low flow of smoke to escape the vent in the charcoal canister. Flow codes are often most efficiently diagnosed by beginning inspection at the canister and the surrounding components.

Need help with a P0497 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
p0497

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0497 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,696

Rating Summary
3,372
162
42
24
96
3,372
162
42
24
96

Paul

22 years of experience
206 reviews
Paul
22 years of experience
Paul is all you need for your car maintenance and repairs, On time arrival !
2004 BMW X5 - CHECK ENGINE LIGHT IS ON INSPECTION - LAS VEGAS, NEVADA

Todd

23 years of experience
11 reviews
Todd
23 years of experience
Great Mechanic
1998 MERCEDES-BENZ E320 - CHECK ENGINE LIGHT IS ON - HAMPTON, VIRGINIA

Ben

38 years of experience
883 reviews
Ben
38 years of experience
Ben is really knowledgable about car diqgnostic. He's really professional, he knows what to do about the car, and very friendly.. i like to have him again anytime i have a problem with my car..
2002 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON INSPECTION - HUMBLE, TEXAS

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
He was on time for our appointment and had it taken care of within the hour. Quality and great communication throughout the process. Thank You Peter!!!
2015 NISSAN QUEST - CHECK ENGINE LIGHT IS ON - ANTHEM, ARIZONA

More related articles

Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...

Related questions

Q: Will a bad O2 sensor damage my car's computer?

The engine control unit (ECU) is a possible cause of the O2 sensor fault codes but not the most likely. Your vehicle is equipped with 4 O2 sensors. Bank 1 is the driver's side. Bank 2 is the passenger side....

Q: Q: Check engine light is on.

First of all, a shop cannot let a vehicle leave the parking lot with the engine light on without your signature saying that you intend to leave with the light on. Second of all, the light might have been on...

Q: Having trouble trying to locate my knock sensor. It's throwing a code for it. 1,2,4,5,6 cylinder misfires

As you may know a knock sensor may fail for any of the following reasons: The knock sensor is faulty and needs to be replaced There is a wiring open/short/fault in the knock sensor circuit The PCM/ECM has failed...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com