Possible Causes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
DTC will set when ECM detects no SP1 (speed sensor) signal while ECM detects SP2 (No. 2 speed sensor) signal and vehicle speed is 6 MPH or more for 4 seconds, Park/Neutral position switch is OFF (except P and N position) and transfer case in any position except N position (4WD) (2 trip detection logic). Possible causes are:
- Vehicle speed circuit is open or shorted between combination meter (instrument cluster) and ECM.
- Defective combination meter (instrument cluster).
- Defective speed sensor.
- Defective ECM.
- Defective skid control ECU.