Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Monitor Result
Refer to CHECKING MONITOR STATUS for detailed information.
The test value and test limit information are described as shown in the following table. Check the monitor result and test values after performing the monitor drive pattern (see READINESS MONITOR DRIVE PATTERN ).
- TID (Test Identification Data) is assigned to each emissions-related component.
- TLT (Test Limit Type):
If TLT is 0, the component is malfunctioning when the test value is higher than the test limit.
- If TLT is 1, the component is malfunctioning when the test value is lower than the test limit.
- CID (Component Identification Data) is assigned to each test value.
- Unit Conversion is used to calculate the test value indicated on generic OBD II scan tools.
TID $02: EVAP system - LEV II Vacuum monitor
| TLT | CID | Unit Conversion | Description of Test Data | Description of Test Limit |
|---|---|---|---|---|
| 1 | $01 | Multiply by 0.183 (mmHg) | Test value of EVAP VSV stuck close: Determined by fuel tank pressure change during vacuum introduction | Malfunction criteria for EVAP VSV stuck closed |
| 0 | $02 | Multiply by 0.0655 (seconds) | Test value of EVAP VSV stuck open: Determined by duration that fuel tank pressure is higher than criteria | Malfunction criteria for EVAP VSV stuck open |
| 0 | $03 | Multiply by 0.0655 (seconds) | Test value of canister closed valve (CCV): Determined by duration that fuel tank pressure is lower than criteria | Malfunction criteria for Canister Closed Valve (CCV) |
| 0 | $04 | Multiply by 0.0458 (mmHg) | Test value 0.04 inch leak: Determined by fuel tank pressure change | Malfunction criteria for 0.04 inch leak |
| 0 | $05 | Multiply by 0.0458 (mmHg) | Test value 0.02 inch leak: Determined by fuel tank pressure change | Malfunction criteria for 0.02 inch leak |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.