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Which O2 is bad (codes P0125, P0135 & P0141)
Posted by ToddH (more from ToddH) on Tue, 14 Jul 2009 06:59:16
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My son’s 1997 9000 CS is showing P0125 (Closed Loop Fuel Control detected Insufficient Coolant Temp), P0135 (Bank 1, Sensor 1 - Circuit for O2 Heater) and P0141 (Bank 1, Sensor 2 - Circuit for O2 Heater). After searching this BB I assume it is a bad O2 but of the two O2 sensors, how can I know which is bad? ToddH
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