Augest 16, 2007
Updated May 1, 2012


Diagnostic Scan Tool for OBDII Vehicles have come down so far in price that everyone should
own one. Some are available for under $20 Here are some reasonable Diagnostic Scan Tools at Amazon

  • P1870 (Transmission Component Slipping)
  • The PCM monitors and compares engine speed to the vehicle speed after the converter
    clutch has been commanded ON in either 3rd or Overdrive. Should the set rpm ratio exceed
    expected parameters the 1870 code is triggered and the PCM increases the transmission main
    line pressure and stops the converter clutch from engaging.


  • P0120 Throttle Position Sensor Signal Circuit
  • P0122 Throttle Position Sensor/APPS Low
  • P0123 Throttle Position Sensor/APPS High
  • P0124 Throttle Position Sensor/APPS Intermittent
  • P0218 High Temperature Operation Activated
  • P0562 Low Battery Voltage
  • P0604 Internal TCM
  • P0605 Internal TCM
  • P0613 Internal TCM
  • P0700 Internal TCM
  • P0705 Check Shifter Signal
  • P0706 Check Shifter Signal
  • P0711 Trans Temp Sensor, No Temp Rise After Start
  • P0712 Trans Temp Sensor Voltage Too Low
  • P0713 Trans Temp Sensor Voltage Too High
  • P0714 Transmission Temperature Sensor Intermittent
  • P0715 Input Speed Sensor Error
  • P0720 Ouput Speed Sensor Error
  • P0725 Engine Speed Sensor Circuit
  • P0731 Gear Ratio Error in 1st
  • P0732 Gear Ratio Error in 2nd
  • P0733 Gear Ratio Error in 3rd
  • P0734 Gear Ratio Error in 4th
  • P0735 Gear Ratio Error in 4th Prime
  • P0736 Gear Ratio Error in Reverse
  • P0740 Torque Converter Clutch, No RPM Drop @ Lockup
  • P0743 Torque Converter Clutch Solenoid/Trans Relay Circuits
  • P0748 Pressure Solenoid Control/Trans Relay Circuits
  • P0750 LR Solenoid Circuit
  • P0751 O/D Switch Pressed (Lo) More Than 5 Minutes
  • P0753 Trans 3-4 Shift Solenoid/Trans Relay Circuits
  • P0755 2/4 Solenoid Circuit (41TE, 42LE)
  • P0755 2C Solenoid Circuit (45RFE)
  • P0760 OD Solenoid Circuit
  • P0765 UD Solenoid Circuit
  • P0770 4C Solenoid Circuit
  • P0783 3-4 Shift Solenoid, No RPM Drop @ Lockup
  • P0841 LR Pressure Switch Sense Circuit
  • P0845 2/4 Hydraulic Pressure Test Failure (41TE, 42LE)
  • P0846 2/4 Pressure Switch Sense Circuit (41TE, 42LE)
  • P0867 Line Pressure Fault
  • P0868 Line Pressure Low
  • P0869 Line Pressure High
  • P0870 OD Hydraulic Pressure Test Failure
  • P0871 OD Pressure Switch Sense Circuit
  • P0875 UD Hydraulic Pressure Test Failure
  • P0876 UD Pressure Switch Sense Circuit
  • P0884 Power Up at Speed
  • P0888 Relay Output Always Off
  • P0890 Switched Battery
  • P0891 Transmission Relay Always On
  • P0897 Worn Out/Burnt Transaxle Fluid
  • P0932 Line Pressure Sensor Fault
  • P0944 Loss of Prime
  • P0951 Autostick Sensor Circuit
  • P0952 Autostick Input Circuit Low
  • P0987 4C Hydraulic Pressure Test Failure
  • P0988 4C Pressure Switch Sense Circuit
  • P0992 2-4/OD Hydraulic Pressure Test Failure
  • P1652 Serial Communication Link Malfunction
  • P1684 Battery Was Disconnected
  • P1687 No Communication with MIC
  • P1694 BUS Communication with Engine Module
  • P1714 Low Battery Voltage
  • P1715 Restricted Port In T3 Range
  • P1716 BUS Communication with Engine Module
  • P1717 No Communication with MIC
  • P1726 UD Hydraulic Pressure Switch Circuit
  • P1727 4 C Hydraulic Pressure Switch Circuit
  • P1728 2C Hydraulic Pressure Switch Circuit
  • P1732 UD Pressure Switch Sense Circuit
  • P1733 4C Pressure Switch Sense Circuit
  • P1734 2C Pressure Switch Sense Circuit
  • P1735 Inadequate Element Volume 4C
  • P1736 Gear Ratio Error in 2nd Prime
  • P1738 High Temperature Logic Activated
  • P1739 Power Up at Speed
  • P1740 TCC O/D Solenoid Performance
  • P1756 Governor Pressure Not Equal to Target @ 15-20 PSI
  • P1757 Governor Pressure Above 3 PSI In Gear @ 0 MPH
  • P1762 Governor Pressure Sensor Offset Volts Too Low Or High
  • P1763 Governor Pressure Sensor Volts Too High
  • P1764 Governor Pressure Sensor Volts Too Low
  • P1765 Switched Battery
  • P1765 Trans 12 Volt Supply Relay Control Circuit
  • P1767 Relay Output Always On
  • P1768 Relay Output Always Off
  • P1770 Inadequate Element Volume LR
  • P1771 Inadequate Element Volume 2C
  • P1772 Inadequate Element Volume OD
  • P1773 Inadequate Element Volume UD
  • P1775 Solenoid Switch Valve Latched in TCC Possition
  • P1776 Solenoid Switch Valve Latched in LR Position
  • P1781 OD Pressure Switch Sense Circuit
  • P1782 2-4 Pressure Switch Sense Circuit
  • P1784 L-R Pressure Switch Sense Circuit
  • P1787 OD Hydraulic Pressure Switch Circuit
  • P1788 2-4 Hydraulic Pressure Switch Circuit
  • P1789 2-4/OD Hydraulic Pressure Switch Circuit
  • P1790 Fault Immediately After Shift
  • P1791 Loss of Prime
  • P1792 Battery Was Disconnected
  • P1793 TRD Link Communication Error
  • P1794 Speed Sensor Ground Error
  • P1795 Internal Transmission Controller
  • P1796 Autostick Input Circuit
  • P1797 Manual Shift Overheat
  • P1798 Worn out / Burnt Transaxle Fluid
  • P1799 Calculated Oil Temp In Use
  • P1789 Transmission System Failure

    GM DTC's

  • P0218 Transmission Fluid Over Temperature
  • P0502 Vehicle Speed Sensor (VSS) Circuit Low
  • P0503 Vehicle Speed Sensor (VSS) Circuit Intermittent
  • P0711 TFT Sensor Circuit Range/Performance
  • P0711 TFT Sensor Circuit Range/Performance
  • P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low
  • P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High
  • P0716 Input Speed Sensor Circuit Intermittent
  • P0716 Input Speed Sensor Circuit Intermittent
  • P0717 Input Speed Sensor Circuit Low
  • P0719 Brake Switch Circuit Low
  • P0719 Brake Switch Circuit Low
  • P0724 Brake Switch Circuit High
  • P0730 Incorrect Gear Ratio
  • P0741 TCC System Stuck Off
  • P0742 TCC System Stuck On
  • P0748 Pressure Control Solenoid Circuit
  • P0751 1-2 Shift Solenoid Valve Performance
  • P0753 1-2 Shift Solenoid Circuit
  • P0756 2-3 Shift Solenoid Valve Performance
  • P0758 2-3 Shift Solenoid Circuit
  • P1810 TFP Valve Position Switch Circuit
  • P1811 Maximum Adapt and Long Shift
  • P1860 TCC PWM Solenoid Circuit Electrical
  • P1887 TCC Release Switch Circuit

    P0181 -P0432    P0433 -P0750    P0751 -P0785



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