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P0420 Diagnostic Trouble Code Discussion for March 2013

Catalyst Efficiency Below Normal (Bank 1)


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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
2000 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3GN87R2Y
P0420: Catalyst Efficiency Below Normal (Bank 1). ... guys. Vehicle came in failing smog test p0420. I scanned and noted a/f sensor steady at 3.28v to 3.34v o2 sensor fluctuating between .2v and .8v . stft 0 ltft +6 replaced both converters aftermarket magnaflow. both exhaust pipes meet and are joined then ...
March 07, 2013
2000 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3GN87R2Y
P0420: Catalyst Efficiency Below Normal (Bank 1). ... guys. Vehicle came in failing smog test p0420. I scanned and noted a/f sensor steady at 3.28v to 3.34v o2 sensor fluctuating between .2v and .8v . stft 0 ltft +6 replaced both converters aftermarket magnaflow. both exhaust pipes meet and are joined then ...
March 08, 2013
2000 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3GN87R2Y
P0420: Catalyst Efficiency Below Normal (Bank 1). ... guys. Vehicle came in failing smog test p0420. I scanned and noted a/f sensor steady at 3.28v to 3.34v o2 sensor fluctuating between .2v and .8v . stft 0 ltft +6 replaced both converters aftermarket magnaflow. both exhaust pipes meet and are joined then ...
March 07, 2013
2000 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3GN87R2Y
P0420: Catalyst Efficiency Below Normal (Bank 1). ... guys. Vehicle came in failing smog test p0420. I scanned and noted a/f sensor steady at 3.28v to 3.34v o2 sensor fluctuating between .2v and .8v . stft 0 ltft +6 replaced both converters aftermarket magnaflow. both exhaust pipes meet and are joined then ...
March 08, 2013