P0420 Diagnostic Trouble Code Discussion for March 2013
Catalyst Efficiency Below Normal (Bank 1)
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| 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 |
