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Hey Jill=They have to be removed with a scanner after '96. Auto zone can do this free. GoodluckJoe

Just had this problem today, Not sure if it will always work, but my 97 Villager had a knock sensor code and a TPS code. I disconected the battery for about 20 min. and then reconected it. I drove the vehicle for about 30 miles and then took it in for an emission test. Passed with flying colors and the OBD monitors tested fine. Again it may not work for you but it worked for me. A mechanic friend told me to do that.

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โˆ™ 2015-07-16 18:04:21
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Q: How long does it take for the OBD readiness codes to set on a Mercury Villager after the battery has been disconnected?
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