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Home >> Honda >> 2005 >> Insight Automatic CVT >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Automatic Transmission (CVT) >> CVT >> DTC Troubleshooting >> DTC P1890: Problem in Shift Control System >> 2001-2004 Models
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2001-2004 Models

NOTE: Record all freeze data and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.
  1. Check whether the scan tool or the HDS indicates another code.

    Does the scan tool or the HDS indicate another code? 

    1. YES  -Do the DTC Troubleshooting for the indicated code(s). Recheck for DTC P1890 after troubleshooting.
    2. NO  -Go to step 2.
  2. Measure the stall speed RPM in the D position (see STALL SPEED TEST ).

    Is the stall speed over 3,500 RPM? 

    1. YES  -Replace the transmission.
    2. NO  -If the stall speed is below 2,000 RPM, replace the lower valve body assembly. If the stall speed is 2,000-3,500 RPM, go to step 3.
  3. Drive the vehicle at 37 mph (60 km/h), and check the engine speed with respect to vehicle speed and throttle position (see ROAD TEST ).

    Is the engine speed within specification? 

    1. YES  -Replace the lower valve body assembly.
    2. NO  -Replace the transmission.
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