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Electrical. Transmission. Transmissions. Lighting and signaling. Engines. Scrap To Power. How to: Simple Coke can Stirling engine plans. Stirling Engine Tutorial / Plans How To Part 1 of 2 (beta) - YouTube - FrontMotion Firefox. P0420 Error Code: Catalyst System Efficiency Below Threshold (Bank 1) Technical Description Catalyst System Efficiency Below Threshold (Bank 1) What does that mean? The catalytic converter is a part of the exhaust system that looks kind of like a muffler, although it's job is very different from that of a muffler.
A catalytic converter's job is to reduce emmissions from the exhaust. The catalytic converter has an oxygen sensor in front and behind it. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Symptoms The main symptom to the driver is the illumination of the MIL (malfunction indicator lamp). Causes A code P0420 may mean that one or more of the following has happened: Possible Solutions Some suggested steps for troubleshooting a P0420 error code include: Check for exhaust leaks at the manifold, pipes, catalytic converter. Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply replace an oxygen sensor (H02S). Related P0420 DTC Discussions. 06-09: How To Read Diagnostic Trouble Codes (DTCs) - Subaru Outback - Subaru Outback Forums.
How to Read Diagnostic Trouble Codes on 2005 thru 2009 Subaru Legacy and Outback The 2005 thru 2009 model year Legacy and Outback can display Diagnostic Trouble Codes (DTCs) directly on the dashboard. No scan tool is needed. No jumper wires are required, and it is not necessary to count blinky lights. The codes are displayed in plain text on the instrument cluster. Trouble codes from the ECM (Engine Control Module), TCM (Transmission Control Module) and ABSCM/VDCCM (ABS or VDC Control Module) are displayed. This procedure was distilled from the FSM. The English translation in the FSM is not very good, so I have attempted to make it easier to follow.
Some notes before starting: - I believe this procedure will work for all 2005 to 2009 Legacys and Outbacks. . - I don't know of a way to reset the codes without a scan tool. . - Exactly what you will see depends on what type of display your car has. The Procedure Starting condition: key off, headlight switch off. 1. 2. 3. 4. 5. 6. 7. 8. Notes.
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