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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
I have a 93 XLT. I had codes 172 and 136. I replaced both O2 sensors and cleared the codes. After about ten miles, the CEL came back on and the codes are back. Wiring looks good. I am looking for ideas.
