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 detailed information (See READINESS MONITOR DRIVE PATTERN ).
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 (Refer to "Confirmation Monitor").
- 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.
- Key-off
TID $02: EVAP system (Key-off monitor)
TEST REFERENCETLT CID Unit Conversion Description of Test Data Description of Test Limit 1 $01 Multiplied by 0.0156 subtract 2 (kPa) Test value for small leak (P0456):
Refer to pressure D(1)Malfunction criteria (0 kPa) 1 $02 Multiplied by 0.0156 subtract 2 (kPa) Test value for gross leak (P0455):
Refer to pressure E(1)Malfunction criteria (0 kPa) 1 $03 Multiplied by 0.0156 subtract 2 (kPa) Test value for vacuum pump stuck OFF (P2401):
Refer to pressure A(1)Malfunction criteria (0 kPa) 1 $04 Multiplied by 0.0156 subtract 2 (kPa) Test value for vacuum pump stuck ON (P2402):
Refer to pressure A(1)Malfunction criteria (0 kPa) 1 $05 Multiplied by 0.0156 subtract 2 (kPa) Test value for vent valve stuck OFF (vent) (P2420):
Refer to pressure C(1)Malfunction criteria (0 kPa) 1 $06 Multiplied by 0.0156 subtract 2 (kPa) Test value for vent valve stuck ON (closed) (P2419):
Refer to pressure A(1)Malfunction criteria (0 kPa) 1 $07 Multiplied by 0.0156 subtract 2 (kPa) Test value for 0.02 inch orifice low flow (P043E):
Refer to pressure B(1)Malfunction criteria (0 kPa) 1 $08 Multiplied by 0.0156 subtract 2 (kPa) Test value for 0.02 inch orifice high flow (P043F):
Refer to pressure A(1)Malfunction criteria (0 kPa) 1 $11 Multiplied by 0.0156 subtract 2 (kPa) Test value for purge VSV stuck close (P0441):
Refer to pressure F(1)Malfunction criteria (0 kPa) 1 $12 Multiplied by 0.0156 subtract 2 (kPa) Test value for purge VSV stuck open (P0441):
Refer to pressure E(1)Malfunction criteria (0 kPa) 1 $13 Multiplied by 0.0156 subtract 2 (kPa) Test value for purge flow (P0441):
Refer to pressure G(1)Malfunction criteria (0 kPa) (1) Pressures A to G are indicated as shown in the following diagram below.
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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.
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