2004 Montero Sport P0446 and P0720 Fault Codes: Location, Diagnosis, and Fixes
I'm seeing fault codes P0446 and P0720 on my 2004 Montero Sport. I understand that P0446 relates to the purge valve or solenoid in the evaporative emission system, while P0720 indicates an issue with the output speed sensor. Where are these components located? How can I determine whether the problem is with the sensors themselves or the wiring? Any guidance on testing procedures using a volt/ohm meter would be greatly appreciated.
P0446 indicates a vent control solenoid or circuit fault. The component is located near the rear of the vehicle, close to the evaporative canister. P0720 points to an output speed sensor or circuit issue, which is situated at the output shaft of the transfer case. Sensor functionality and wiring integrity can be tested using a multimeter for voltage and resistance readings. For detailed electrical diagrams, refer to BBBind.com. Additionally, consult this forum's section on trouble codes for common causes and troubleshooting steps.