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Procedure for checking codes


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Hello every one, would some one please be kind enough to tell me the procedure for checking the codes on my 01 Seville. My wife said today the Service Engine Soon light came on. We are 65 mi. from dealer and I want to check them before I call. I have read some post on earlier models but didn't know if they were same.

thanks for any help.


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This should work for '01....

1998 - 2004 Seville ; On Board Diagnostics Display

You will use the 3 switches located to the right of the Driver Information Center (DIC) to activate and respond to the OBD prompts on the DIC.



INFO DOWN or INFO UP = manual toggle

Ignition ON, acknowledge any warning messages; press ON/OFF and INFO UP together for 2 to 3 seconds. Everything in front of you lights up for 4 or 5 seconds, then you will see:

Display shows "ALL?"

Answering YES will display "ALL CODES?"

Answering YES will run automatic test sequence and display codes, if any. Systems and codes will scroll faster than I am able to read them and write them; not to worry.

"ALL CLEAR CODES?" will display at the end of the automatic test. If you are satisfied you have the information you need, answer YES to clear/erase all error codes.

Answering "ALL?" with INFO DOWN will toggle systems test manually in order.

Answering "ALL?" with INFO UP will toggle system test manually in reverse order.

Press INFO RESET to reset DIC to "ALL?" to start again.

Ignition OFF to exit.


ABS (Antilock Brake System)

AMP (Amplifier)

DDM (Door Driver Module)

DIM (Dash Integration Module)

IPC (Instrument Panel Cluster)

IPM (Instrument Panel Module)

IRC (Integrated Radio Module)

PCM (Powertrain Control Module)

RFA (Remote Function Actuation)

RIM (Rear Integration Module)

SDM (Sensing and Diagnostic Module) Includes airbag crash data. Under RF seat

VTD (Vehicle Theft Deterrent)

MSM (Memory Seat Module)

TTM (Tilt/Telescoping Module)

RSS (Road Sensing Suspension)


Drive your car.

Use your cell phone.


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DDM 1713 Mirror Switch Down Right-Stuck To High- no

DDM 1718 Power Fold Switch Stuck High-no

IPC U1016 Loss Of Communications with PCM

PCM P0404 EGR Sytem Performance

TTM U1016 Loss Of Communications with PCM

VTD B1009 EEPROM Checksum Error

VTD B2734 Coded Key Controller Memory Failure

PCM U0404 is the only code out of all of those that should have turned on the "Service Engine Soon" light. I got most of those just from having a loose terminal on the battery. The only one actually associated with the engine is PCM P0404.

(EGR System Performance) This diagnostic test checks for a malfunction in the circuitry and hardware of the linear EGR valve. The ability of the PCM to control the EGR valve is checked with this test. When the PCM commands the EGR valve to a desired position and changes that position less than a calibratable amount, this test then checks the EGR pintle position error. If the pintle position error, which is the difference between the desired pintle position and the actual pintle position, is too great then this DTC code is set.

In other words, the EGR valve is not operating as well as the PCM would like. If the car still runs fine, you probably just need to clean the EGR valve. It's most likely getting stuck when the PCM goes to test it. Good luck. ;)

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