GM Service Manual Online
For 1990-2009 cars only

The DTCs are grouped into several types. Each type has a unique set of characteristics for STL or MIL operation, DTC storage, and DTC clearing. The following list contains a brief summary of the types and the associated properties of each:

    • Type A is emissions related. The MIL illuminates, the DTC stores on the first fail and the Freeze Frame data is captured.
    • Type B is emissions related. If the fault is active for 2 consecutive driving cycles (misfire and fuel trim DTCs differ slightly), the MIL illuminates, the DTC is stored and the Freeze Frame data is captured at the time of the second fail. At the time of the first fail, the MIL does not illuminate and no Freeze Frame data records. The DTC will appear in memory as pending. If the next trip reports a pass, the DTC is gone.
    • Type C is non-emissions related and does not turn on the MIL, but may turn on an auxiliary service lamp if the vehicle is so equipped. The DTC stores at the time of the first fail.
    • Type D is non-emissions related, does not turn on any lamp. The DTC stores at the time of the first fail.

The TCM DTC Type Table contains all of the Transmission DTCs and their type. DTCs in bold print may also set in the ECM. Refer to Engine Controls for engine system diagnosis and information.

DTC

Description

Type

MIL

STL

P0560

TCM System Voltage

B

Yes

Yes

P0602

TCM Internal Error

B

Yes

Yes

P0703

Brake Switch Circuit

D

No

No

P0705

Transmission Range Switch Circuit

B

Yes

Yes

P0706

Transmission Range Switch Performance

D

No

No

P0711

Transmission Overtemperature

D

No

No

P0712

Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

D

No

No

P0713

Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

D

No

No

P0722

Transmission Output Speed Sensor Circuit

B

Yes

Yes

P0725

Engine Speed Circuit

B

Yes

Yes

P0730

Transmission Component Slipping

B

Yes

Yes

P0743

Torque Converter Clutch (TCC) Solenoid Control Circuit

B

Yes

Yes

P0748

Pressure Control Solenoid Control Circuit

C

No

Yes

P0753

1-2/3-4 Shift Solenoid Control Circuit

B

Yes

Yes

P0758

2-3 Shift Solenoid Control Circuit

B

Yes

Yes

P1560

TCM Supply Voltage Interrupted

D

No

No

P1600

Transmission Power Relay Output Circuit

B

Yes

Yes

P1604

TCM Internal Error

B

Yes

Yes

P1605

TCM Internal Error

B

Yes

Yes

P1625

TCM Internal Error

B

Yes

Yes

P1705

Park/Neutral Output Circuit

D

No

No

P1740

Tranamission Torque Reduction Request Circuit

C

No

Yes

P1743

TP Signal Invalid

B

Yes

Yes

P1835

WOT Switch Circuit

D

No

No

P1844

Traction Control Torque Reduction Request Circuit

D

No

No

P1845

Transmission Gear Ratio Output Circuit

D

No

No

P1850

Band Apply Solenoid Control Circuit

C

No

Yes

P1870

TCC Stuck Off

B

Yes

Yes

P1890

ECM Data Input Circuit

B

Yes

Yes

P1895

Engine Torque Delivered Circuit

D

No

No