Po500 code on mercury villager

SOURCE: 98 mercury villager OBD I code P0135

This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.
Repair short or open or high resistance in wiring harness or harness connectors.
Since you have already changed out your O2 sensor (as long as you used to OEM replacement and not the "Universal" replacement) you should not have to replace it again. You might check your thermostat to part of the time it takes for the O2 sensor to start switching being based on coolant temp, if your thermostat is not operating properly, it could cause the coolant temp to take longer than what is considered by the ECM to be normal.

SOURCE: where is a knock sensor for 1998 Mercury Villager located?

Here is a image of it's location, I hope it helps.

SOURCE: Where is the Vehicle speed sensor located on a

2.0L is on the lower rear of transaxle. 2.5L is on the right side of the transaxle.

Harvey N Tawatao

• 3854 Answers
• Posted on Sep 02, 2009

SOURCE: Code reader knock sensor where is it located

According to the Haynes manual it is under the intake manifold, Upper and lower intake manifolds must be removed for access. If you go to Auto Zone, they have the sensor and can give you the step by step instructions to replacing the knock sensor with common tools. Good luck and hope this help.

Greg Bernett

• 2993 Answers
• Posted on Sep 13, 2010

SOURCE: how to replace the speed sensor on a 2000 mercury

Removal & Installation

1. Disconnect the negative battery cable.
   
2. Raise and safely support the front of the vehicle securely on jackstands.
   
3. Disconnect the VSS electrical connector.
   
4. Remove the VSS hold-down bracket bolt and remove the bracket.
   
5. Remove the VSS from the vehicle.
   
6. The installation is the reverse of removal. When installing the VSS hold-down bracket, tighten the bolt to 44–61 inch lbs. (5–7 Nm).