P0421 Mitsubishi Outlander
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P0421 Code: Warm Up Catalyst Efficiency Below Threshold (Bank 1) - In
P0421 code: warm up catalyst efficiency below threshold (bank 1) I have a 06 mitsubishi endeavor that has an error code p0421. the Tech tips (by alldata): bug causes dtc p0171 on mitsubishi
Mitsubishi outlander: warm up catalyst efficiency → below threshold
Mitsubishi p0421 endeavor code b348 44b8 432f sensorP0421 mitsubishi Mitsubishi outlander p2096 alternator bank p0421 problems catalyst threshold efficiency warm below.
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