Description of Flash Code 21
The SAE J1587 equivalent code for Flash Code 21 is p 91/3, TPS/AP Sensor circuit high.
Flash Code 21 indicates that the Throttle Position Sensor (TPS)/AP Sensor, see Figure "TPS/AP Sensor" , input to the ECM/ECU has exceeded 95% (normally >4.75 volts) of the sensor supply voltage.
|Series 60 DDEC V Troubleshooting Guide - 6SE570|
|Generated on 10-13-2008|