1999 Toyota Camry Emission Test code

KOFISAMMY

MEMBER
1999 TOYOTA CAMRY
4 CYL
2WD
AUTOMATIC
130,000 MILES

I recently failed performed the yearly emission test on my camry but it failed. This is the first time. Am told it is because it has the engine light on. However, it had the engine light on last year when I did it and it passed. Nontheless, the results of the test indicates that the MIL CMD failed with rpm = 0705 and DTC1 = P0446, Codes read = 01, DLC = Pass, Readiness =Pass, Koeo = Pass. What am I looking at to get it fixed?

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

Hi kofisammy,

Here is a description of the Code.

DTC P0441: INCORRECT EVAP PURGE FLOW OR DTC P0446: EVAP VENT CONTROL CIRCUIT
CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced on models equipped with engine immobilizer system, ECM must be programmed with proper ignition key code.

Circuit Description
Vapor pressure sensor and vapor pressure sensor Vacuum Switching Valve (VSV) are used to detect faults in EVAP system. DTC is set if EVAP system leak is detected or if there is a malfunction in EVAP VSV, vapor pressure sensor VSV or in vapor pressure sensor. Possible causes are:

Vapor pressure sensor VSV circuit is open or shorted.
Vapor pressure sensor circuit is open or shorted.
Defective vapor pressure sensor VSV.
Defective vapor pressure sensor.
Defective EVAP VSV.
EVAP VSV circuit is open or shorted.
Disconnected or blocked vacuum hose.
Defective charcoal canister.