Engine Controls - SES Light, Code 22 (TPS Low)/Poor Idle

91PONTIAC15

Bulletin Number: 92-6-2B
Reference Number: 136514
Publish Date: 8/91


Subject: SERVICE ENGINE SOON LIGHT (CODE 22) (PROCEDURE/DIAGNOSTICS REPLACE TPS)



Models:
Affected 1991-92 FIREBIRD MODELS


This bulletin is being revised to pertain only to 5.0L L03 TBI engines. This bulletin cancels and replaces bulletin 92-6-2A.

This bulletin pertains to 5.0L L03 TBI engines.

Condition: Some owners of the above vehicles may comment on a Service Engine Soon Light - Code 22 - Throttle Position Sensor low. Additional comment may be poor idle quality. This condition may be more prevalent after initial startup.

Cause: The above concerns may result from an intermittent electrical contact inside the Throttle Position Sensor (TPS).

Correction: If any of the subject conditions are found, complete the following procedure:

1. Perform the normal diagnostics per Section 6E of the Service Manual.

2. If no problems are found using the normal 6E diagnostics or the bulletin, replace the TPS with a new TPS kit, P/N 17112679 per the procedure in Section 6E of the Service Manual. The new TPS will have a yellow dot at the connector area for easier identification.

Part is currently available from GMSPO.

Use applicable labor operations and times.