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Makes 🢒 GMC_Truck 🢒 1997 🢒 Yukon - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Diagnostic Trouble Code Identification

Diagnostic Trouble Code Identification 6.5L Diesel

Diagnostic Trouble Code (DTC) Identification Diagnostic Types

DTC

Description

DTC Type

Default Action

P0218

Transmission Fluid Overtemperature

D
    • DTC P0218 will be stored in the PCM history.
    • The PCM freezes shift adapts.

P0560

System Voltage Malfunction

D
    • DTC P0560 will be stored in PCM history.
    • The PCM inhibits TCC engagement.
    • The PCM freezes shift adapts.
    • The PCM turns off the PC Sol. Valve.
    • The PCM commands an immediate landing into 2nd gear.

P0711

Transmission Fluid Temperature (TFT) Sensor Circuit Range/Performance

B
    • DTC P0711 will be stored in the PCM history.
    • The PCM uses a TFT default value of 140°C (284°F).
    • The PCM freezes shift adapts.
    • The PCM illuminates the Malfunction Indicator Lamp (MIL).

P0712

Transmission Fluid Temperature Sensor Circuit - Low Input

B
    • DTC P0712 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM uses a TFT default value of 140°C (284°F).
    • The PCM illuminates the MIL.

P0713

Transmission Fluid Temperature Sensor Circuit - High Input

B
    • DTC P0713 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM uses a TFT default value of 140°C (284°F).
    • The PCM illuminates the MIL.

P0716

Input/Turbine Speed Sensor Circuit - Range/Performance

B
    • DTC P0716 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure
    • The PCM illuminates the MIL.

P0717

Input/Turbine Speed Sensor Circuit - No Signal

B
    • DTC P0717 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P0719

Brake Switch Circuit - Low Input

D

DTC P0719 will be stored in PCM history.

P0722

Output Speed Sensor - Low Input

B
    • DTC P0722 will be stored in the PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM calculates OSS from ISS.
    • The PCM illuminates the MIL.

P0723

Output Speed Sensor Intermittent

B
    • DTC P0723 will be stored in the PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM calculates OSS from ISS.
    • The PCM illuminates the MIL.

P0724

Brake Switch Circuit - High Input

D
    • DTC P0724 will be stored in VCM history.
    • Apply TCC if APP is greater than 4% and the vehicle speed is greater than 30 mph.

P0741

Torque Converter Clutch (TCC) Stuck Off

B
    • DTC P0741 will be stored in PCM history.
    • The PCM inhibits TCC engagement.
    • The PCM inhibits fourth gear engagement.
    • The PCM illuminates the MIL.

P0742

Torque Converter Clutch (TCC) Stuck On

B
    • DTC P0742 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P0748

Pressure Control Solenoid (PC Sol. Valve) - Electrical

D
    • DTC P0748 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure by disabling the PC Sol. Valve.

P0751

1-2 Shift Solenoid Valve (1-2 SS Valve) Performance

B
    • DTC P0751 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P0753

1-2 Shift Solenoid Valve (1-2 SS Valve) - Electrical

A
    • DTC P0753 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P0756

2-3 Shift Solenoid Valve (2-3 SS Valve) - Performance

A
    • DTC P0756 will be stored in PCM history.
    • The PCM commands an immediate landing into second gear.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P0758

2-3 Shift Solenoid Valve (2-3 SS Valve) - Electrical

A
    • DTC P0758 will be stored in the PCM history
    • The PCM commands an immediate landing to second gear.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P1810

Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.)

B
    • DTC P1810 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM assumes a D4 shift pattern.
    • The PCM commands maximum line pressure.
    • The PCM illuminates the MIL.

P1811

Maximum Adapt Long Shift

D
    • DTC P1811 will be stored in PCM history.
    • The PCM freezes shift adapts.
    • The PCM commands maximum line pressure.

P1860

Torque Converter Clutch Pulse Width Modulation (TCC PWM) Electrical

A
    • DTC P1860 will be stored in PCM history
    • The PCM inhibits TCC engagement.
    • The PCM inhibits fourth gear engagement.
    • The PCM freezes shift adapts.
    • The PCM illuminates the MIL.

P1870

Transmission Component Slipping

B
    • DTC P1870 will be stored in PCM history.
    • The PCM commands maximum line pressure.
    • The PCM inhibits TCC engagement.
    • The PCM inhibits fourth gear engagement.
    • The PCM freezes shift adapts.
    • The PCM illuminates the MIL.

P1871

Undefined gear ratio

D
    • DTC P1871 will be stored in PCM history.
    • The PCM commands maximum line pressure.
    • The PCM freezes shift adapts.

P1875

Four Wheel Drive Low Switch - Input Malfunction

B
    • DTC P1875 will be stored in the PCM history.
    • The PCM freezes shift adapts.
    • The PCM asumes a 4WD Lo state if the switch fails when open, or the PCM assumes a 4WD High state if the switch fails when closed.
    • The PCM illuminates the MIL.

DTC Types:

  • A - Emission related, will turn on the MIL after the first failure.
  • B - Emission related, will turn on the MIL after two consecutive trips with a failure.
  • C - Non-emission related, will turn on the service lamp after the first failure.
  • D - Non-emission related, no lamps.

Diagnostic Trouble Code Identification 5.7L and 7.4L Gas

Diagnostic Trouble Code (DTC) Identification Diagnostic Types

DTC

Description

DTC Type

Default Action

P0218

Transmission Fluid Overtemperature

D
    • DTC P0218 will be stored in the VCM history.
    • The VCM freezes shift adapts.

P0502

Output Shaft Speed (OSS) Sensor - Low Input

D/B
    • DTC P0502 will be stored in the VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands maximum line pressure
    • The VCM defaults a calculated OSS from the A/T ISS Sensor output.
    • The VCM illuminates the MIL for California emissions.

P0560

System Voltage Malfunction

D
    • DTC P0560 will be stored in VCM history
    • The VCM freezes shift adapts.
    • The VCM commands an immediate landing to second gear.
    • The VCM turns off all transmission output devices

P0711

Automatic Transmission Fluid Temperature (TFT) Sensor Circuit Range/Performance

D/B
    • DTC P0711 will be stored in the VCM history.
    • The VCM freezes shift adapts.
    • The VCM defaults the TFT to 140°C
        (284°F).
    • The VCM illuminates the MIL for California emissions.

P0712

Transmission Fluid Temperature Sensor Circuit - Low Input

D/B
    • DTC P0712 will be stored in VCM history
    • The VCM freezes shift adapts
    • The VCM defaults TFT to 140°C (284°F) for shift scheduling (hot mode pattern)
    • The VCM illuminates the MIL for California emissions.

P0713

Transmission Fluid Temperature Sensor Circuit - High Input

D/B
    • DTC P0713 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM defaults TFT to 140°C (284°F) for shift scheduling (hot mode pattern)
    • The VCM illuminates the MIL for California emissions.

P0716

Input/Turbine Speed Sensor Circuit - Range/Performance

D/B
    • DTC P0716 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands drive 2 line pressure
    • The VCM illuminates the MIL for California emissions.

P0717

Input/Turbine Speed Sensor Circuit - No Signal

D/B
    • DTC P0717 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands Drive 2 line pressure.
    • The VCM illuminates the MIL for California emissions.

P0719

Brake Switch Circuit Stuck On - Low Input

D/B
    • DTC P0719 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM inhibits fourth gear engagement
    • The VCM illuminates the MIL for California emissions.

P0724

Brake Switch Circuit Stuck Off - High Input

D

DTC P0724 will be stored in VCM history.

P0730

Undefined Gear Ratio

D
    • DTC P0730 will be stored in VCM history
    • The VCM commands maximum line pressure.
    • The VCM freezes shift adapts.

P0741

Torque Converter Clutch (TCC) Circuit Stuck Off

D/B
    • DTC P0741 will be stored in VCM history.
    • The VCM inhibits TCC engagement.
    • The VCM inhibits fourth gear engagement.
    • The VCM illuminates the MIL for California emissions.

P0742

Torque Converter Clutch (TCC) Stuck On

D/B
    • DTC P0742 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands Drive 2 line pressure.
    • The VCM illuminates the MIL for California emissions.

P0748

Pressure Control Solenoid Valve (PC Sol. Valve) - Electrical

D
    • DTC P0748 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM disables the PC Sol. Valve.

P0751

1-2 Shift Solenoid Valve (1-2 SS Valve) - Performance

D/B
    • DTC P0751 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands maximum line pressure.
    • The VCM illuminates the MIL for California emissions.

P0753

1-2 Shift Solenoid Valve (1-2 SS Valve) - Electrical

D/A
    • DTC P0753 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM maximum line pressure.
    • The VCM illuminates the MIL for California emissions.

P0756

2-3 Shift Solenoid Valve (2-3 SS Valve) - Performance

D/A
    • DTC P0756 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM commands maximum line pressure.
    • The VCM commands an immediate landing to second gear.
    • The VCM illuminates the MIL for California emissions.

P0758

2-3 Shift Solenoid Valve (2-3 SS Valve) - Electrical

D/A
    • DTC P0758 will be stored in VCM history
    • The VCM freezes shift adapts.
    • The VCM commands maximum line pressure.
    • The VCM commands an immediate landing to second gear.
    • The VCM illuminates the MIL for California emissions.

P1810

Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.)

D/B
    • DTC P1810 will be stored in VCM history.
    • The VCM freezes shift adapts.
    • The VCM assumes D4 shift pattern.
    • The VCM commands maximum line pressure.
    • The VCM forces TCC apply when fourth gear is commanded.
    • The VCM illuminates the MIL for California emissions.

P1860

Torque Converter Clutch Pulse Width Modulation Solenoid Valve (TCC PWM Sol. Valve)

D/A
    • DTC P1860 will be stored in VCM history
    • The VCM inhibit s TCC engagement.
    • The VCM inhibits fourth gear engagement.
    • The VCM illuminates the MIL for California emissions.

P1870

Transmission Component Slipping

D/B
    • DTC P1870 will be stored in VCM history.
    • The VCM commands maximum line pressure.
    • The VCM inhibits TCC engagement.
    • The VCM inhibits fourth gear engagement.
    • The VCM freezes shift adapts.
    • The VCM illuminates the MIL for California emissions.

P1875

Four Wheel Drive Low Switch - Input Malfunction

D/B
    • DTC 1875 will be stored in the VCM history.
    • The VCM freezes shift adapts.
    • By measuring ISS and OSS and the commanded gear, the VCM will assume the correct state of the switch for 4WD Low or not. In order to measure the A/T ISS and OSS, the vehicle must be moving.
    • The VCM illuminates the MIL for California emissions.

DTC Types:

  • A - Emission related, will turn on the MIL after the first failure
  • B - Emission related, will turn on the MIL after two consecutive trips with a failure
  • C - Non-emission related, will turn on the service lamp after the first failure
  • D - Non-emission related, no lamps