Questions & Answers for: p0420 catalyst

...MALFUNCTION BANK NO.1 OR SINGLE SENSOR P0325 Knock Sensor Circuit Malfunction P0420 Catalyst System Efficiency Below Threshold I would change the knock sensor first and the other may clear up

P0420 - Catalyst System Efficiency Below Threshold (Bank 1) www.obd-codes.com/p0420 More than likely its either an o2 sensor, or a bad catalytic converter, look at this forum: http://www.newcelica.org

P0420- Catalyst System Efficiency Below Threshold Bank 1 Possible Causes: - Three way catalyst converter Bank 2 - Exhaust tube - Intake air leaks - Fuel injectors may be faulty - Fuel injector leaks -

...What should I do? Thanks the following links can assist you with causes and repair P0420 Catalyst System Efficiency Below Threshold https://www.autocodes.com/p0420.html P0420 OBD II Trouble ...

...P0420 CHRYSLER - Catalyst System Efficiency Bank 1 LowPossible causes- Three way catalyst converter Bank 1 - Exhaust tube - Intake air leaks - Fuel injectors may be faulty - Fuel injector leaks - ...

...P0420 - Catalyst System Efficiency Below Threshold Bank 1Possible causes- Three way catalyst converter Bank 1 - Exhaust tube - Intake air leaks - Fuel injectors may be faulty - Fuel injector leaks - ...

...Code P0420 Failed emissions P0420 Catalyst System Efficiency Below Threshold Bank 1 Probably the cat is bad .You need to have it tested How To Diagnose Check Engine Light Code P0420 Catalyst Bank ...

...P0420 - Catalyst System Efficiency ... If they have failed, it is likely due to something else that caused it to fail. ... the catalytic converter is broken or failed, it may be restricting the ...

P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8

...P0420: Catalyst System Efficiency ? Below ... Trunk issue is not so easy. Probably the switch or the lock. Also check fuses. ...