Learn About Common Subaru Service P-Codes

Learn more about the most common OBD P-Codes from the experts at Colonial Subaru

At Colonial Subaru, we're often asked about the most common Onboard Diagnostics Problem Codes, or OBD P-Codes for short, and what they mean for Subaru maintenance and repairs. Our certified Subaru service center serves drivers from Waterbury to Norwalk, CT and even Brewster, NY, so we've seen it all when it comes to Subaru repairs and maintenance. Read on to learn more about the various P-Codes your Subaru might experience, and learn what you can do about them.

Most Common OBD P-Codes

  • P0420: Catalytic converter not operating at max capacity
  • P0171: Fuel injection system is not operating properly
  • P0031: Bank 1 (Pre catalytic converter heated oxygen sensor) heating element having low voltage
  • P0301: Cylinder #1 is experiencing misfires
  • P0302: Cylinder #2 is experiencing misfires
  • P0303: Cylinder #3 is experiencing misfires
  • P0304: Cylinder #4 is experiencing misfires
  • P0026: Variable valve lift solenoid for the intake valves for bank 1 takes too long to engage, or doesn't at all
  • P0028: Variable valve lift for the intake valves for bank 2 will not engage
  • P0456: Small leak in the evaporative emissions control system
  • P0455: Large leak in the engine evaporative emissions control system

What can I do if my Subaru is displaying one of these OBD P-Codes?

If you're experiencing any of the P-Codes listed above, or any other readout for that matter, you owe it to yourself to schedule a service appointment with our Danbury, CT Subaru service center as soon as possible. Reach out to our team today or schedule a service appointment online for all our Subaru repair needs.

  1. Colonial Subaru

    89 Newtown Rd
    Danbury, CT 06810

    • Sales: (203) 744-8383
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  • Contact our Service Department at: (203) 744-8383
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