Welcome to PriusChat

We'd love to have you join our community and participate in the conversation! Sign up for FREE today.

Sign Up
  1. TGB4 2014 Prius Convention Hotel Discounts are ending this week. Click for more information. All Access registration with personalized items ends Sept 1. Register now!

2001 Prius: P3002 OBD II Code

Discussion in 'Generation 1 Prius Discussion' started by ragnarkar, Dec 10, 2011.

Social Buttons

  1. ragnarkar

    ragnarkar Junior Member

    Mar 20, 2011
    Likes Received:
    Pasadena, CA
    Your Vehicle Year:
    2001 Prius
    I just got an OBD II reader and ran it through its diagnostic program on a 2001 Prius (my gf's.) The 2 error codes I received are:

    P0420 (Catalytic convertor problem or something; this I'll fix and is not the point of this thread.)

    P3002: I have no idea what this is, Googled and it seems to be HV ECU Communication failure.

    Some facts about the car:

    - This car has about 120,000 miles,
    - Was bought from the original owner at about 110,000 miles earlier this year (my gf's the 2nd owner.)
    - Clean title, never been in an accident (if you don't count hitting the car in front at < 0.5mph when parallel parking.)
    - Has never had any serious problems come up since owning it.
    - Been a little behind on the maintenance, only maintenance done was oil changes every 4000-5000 miles, changing the drive belt, fixed some steering problem (got a Toyota recall notice for that), and tire rotations.

    How serious is this error and is immediate attention needed in the near (or far) future?
Similar Threads: 2001 Prius
Forum Title Date
Prius Cars For Sale F/S: 2001 Prius - new battery last year Aug 4, 2014
Generation 1 Prius Discussion Help! 2001 Prius won't start Aug 2, 2014
Generation 1 Prius Discussion Help figuring out specs/package on 2001 Prius Jul 19, 2014
Gen II Prius Main Forum 2001 Toyota Prius : What is this mounting bracket for ? Jul 14, 2014
Private Sales 2001-2003 Toyota Prius Battery ECM ECU 89890-47060 for sale Jun 4, 2014