GM Service Manual Online
For 1990-2009 cars only

Conditions for Clearing the DTC

Notice: Turn the ignition OFF when installing or removing the ECM connectors and disconnecting or reconnecting the power to the ECM (battery cable, ECM pigtail, ECM fuse, jumper cables, etc.) in order to prevent internal ECM damage.

When the ECM sets a Diagnostic Trouble Code (DTC), the Malfunction Indicator Lamp (MIL) lamp will be turned on only for type A, B and E but a DTC will be stored in the ECM's memory for all types of DTC. If the problem is intermittent, the MIL will go out after 10 seconds if the fault is no longer present. The DTC will stay in the ECM's memory until cleared by scan tool. Removing battery voltage for 10 seconds will clear some stored DTCs. DTCs with an X do not occur in that version.

DTCs should be cleared after repairs have been completed. Some diagnostic tables will tell you to clear the codes before using the chart. This allows the ECM to set the DTC while going through the chart, which will help to find the cause of the problem more quickly.

DTC

With Euro Emissions

Without Euro and North America Emissions

P0107

A

A

P0108

A

A

P0112

E

E

P0113

E

E

P0117

A

A

P0118

A

A

P0122

A

A

P0123

A

A

P0131

A

A

P0132

A

A

P0133

E

X

P0135

E

X

P0137

E

X

P0138

E

X

P0140

E

X

P0141

E

X

P0171

E

X

P0172

E

X

P0222

A

A

P0223

A

A

P0261

A

A

P0262

A

A

P0264

A

A

P0265

A

A

P0267

A

A

P0268

A

A

P0270

E

E

P0271

E

E

P0300

A

X

P0300

E

X

P0327

E

E

P0335

E

E

P0336

E

E

P0337

E

E

P0341

E

E

P0342

E

E

P0351

A

A

P0352

A

A

P0400

E

E

P0404

E

E

P0405

E

E

P0406

E

E

P0420

A

X

P0444

E

E

P0445

E

E

P0462

Cnl

X

P0463

Cnl

X

P0480

Cnl

Cnl

P0481

Cnl

Cnl

P0501

A

A

P0510

A

A

P0511

E

E

P0512

E

E

P0513

Cnl

Cnl

P0562

Cnl

Cnl

P0563

Cnl

Cnl

P0601

E

E

P0604

E

E

P0605

E

E

P0656

Cnl

X

P1230

A

A

P1231

A

A

P1320

A/E

X

P1321

E

X

P1382

Cnl

X

P1385

Cnl

X

P1402

E

E

P1403

E

E

P1404

E

E

P1537

Cnl

Cnl

P1538

Cnl

Cnl

P1610

A

A

P1611

A

A

P1628

Cnl

Cnl

P1629

Cnl

Cnl

P1660

E

X

P1661

E

X

X - Indicates that the DTC does not occur in this version.