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Old 11-28-2017, 06:36 PM   #1
Scooby Newbie
Member#: 478409
Join Date: Nov 2017
'10 ImpOutbackSport

Default Cel P0026

My '10 Impreza Outback Sport 2.5 non-turbo threw a code P0026 about 200 miles after a head gasket replacement and an oil change. The mechanic saw that the crankcase was overfilled by over a quart so he changed the oil completely and reset the CEL. After another 300 miles, the P0026 is back.

60k - short block installed (oil leaked out and threw a rod after a dealer oil change)
130k - timing and accessory belts, water pump, t-stat, trans and diff fluids
166k - head gaskets, timing and accessory belts, t-stat

Planned for 167k - heater core

There is also a mild knock that has been going on for about 30k miles. Is there a way to determine if the knock is caused by the malfunctioning solenoid? Once, I used a 5w40 and ZMax oil additive and that eliminated the knock.

Generally, the engine runs well, but I have noticed a slight decrease in power but no vibrations, roughness or stalling.

thank you.
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