Subaru Outback Code P0420

Asked by GuruHQWWT Jul 26, 2019 at 09:17 PM about the 2008 Subaru Outback 2.5 i

Question type: Maintenance & Repair

My CEL is on steady and cruise control is flashing
in my 08 Subaru outback. Got the codes read and it
read P0240. I have read some stuff that makes this
seem like not a big deal to ignore (and more cost
effective), but I am not buying in on that totally.
What can you guys tell me about what it means
and is it urgent to get fixed?

3 Answers
221,315

Rowefast answered 4 years ago

P0420 Subaru Possible Causes Faulty Three-way Catalyst Converter Bank 1 Exhaust Tube Intake Air Leaks Faulty Oxygen (O2) Sensor Faulty Fuel injector(s) Leaking Fuel Injector (s) Faulty Spark plugs Improper Ignition Timing Faulty Engine Control Module (ECM) Dirty Air Filter.

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