OBD-II DTC Codes P1800 – P1999
P1810 TFP Valve Position Switch Circuit (GM)
P1811 Maximum Adapt and Long Shift (GM)
P1819 Internal Mode Switch – No Start/Wrong Range (GM)
P1820 Internal Mode Switch Circuit A Low (GM)
P1822 Internal Mode Switch Circuit B High (GM)
P1823 Internal Mode Switch Circuit P Low (GM)
P1825 Internal Mode Switch – Invalid Range (GM)
P1826 Internal Mode Switch Circuit C High (GM)
P1860 TCC PWM Solenoid Circuit Electrical (GM)
P1887 TCC Release Switch Circuit (GM)
P1899 Park/Neutral Position Switch Stuck In Park or In Gear (CHRYSLER)
P1900 Output Shaft Speed Sensor Circuit Failure (Ford)
