You need to plug an OBD scanner into it.
To retrieve trouble codes from a 1989 Pontiac Sunbird, you need to use the onboard diagnostics system. Start by turning the ignition key to the "On" position without starting the engine. Then, locate the diagnostic connector, usually found under the dashboard near the steering column, and use a jumper wire to connect terminals A and B. After doing this, the check engine light will flash a series of codes that you can then decode using a service manual or online resources to identify any issues.
You need an OBDII scanner to retrieve the codes.
since 1995 to present, you have to retrieve codes by use of a obd2 scanner.
Some Haynes manuals have ECU codes
With a scan tool
1994 year and up need a code reader to retrieve their codes. Most auto parts stores offer this as a free service.
You will need a diagnostic scanner to retrieve the codes.
You need to go to a shop that has a scanner and they can retrieve the codes and diagnose the problem for you.
Trouble code PO151
You need a scan tool.
No.
No.