Prius 2nd Gen Warning Lights & ODB Code help

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Scott Miami, Jan 16, 2025 at 7:20 PM.

  1. Scott Miami

    Scott Miami Junior Member

    Joined:
    Oct 31, 2014
    2
    0
    0
    Vehicle:
    2004 Prius
    Model:
    II
    Hello, My trusty Prius started with persistent Brake and ABS Warning Lights after startup. It seems to drive fine and I've checked brake fluid levels. A dealer wanted me to tow the truck in in order to get diagnostic codes, as he couldn't tell me if it would be safe to drive until then.

    I have since bought an OBD3 reader, compatible with the Prius 2nd gen that covers ABS codes. The entire electrical a/c system had been replaced about 1 year ago. Here is the readout analysis:

    ABS/VSC/TRAC
    · C1343 Current Hydraulic System Malfunction (RR)
    EMPS – Electric Motor Power Steering
    · C1532 Current ECU Malfunction
    Air Conditioner codes
    · B1413 History Evaporator temperature circuit or Evaporator fin thermistor
    · B1421 Current Solar Sensor Circuit (passenger)
    · B1433 History Air outlet damper position sensor circuit
    · B1441 History Air Mix Damper servo motor circuit (passenger)
    · B1442 History Air inlet Damper control servo motor
    · B1443 History Air out damper position sensor circuit
    --------------
    Can I safely drive this car about 30 miles, or should I pay for towing?
    What does the "Current" versus "History" readout mean?
    Can one determine what the fix would be from just those codes?

    Thanks much,

    Scott
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,592
    50,268
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    are the brakes working okay?