Engine Controls - Service Engine Light, Code 22 (TPS)

91buick07

Bulletin: 92-6E-2

Date: August 91

Ref. No.: 92-017-6E

Corp. Ref. No.: 136514


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

MODELS AFFECTED: 1991 ROADMASTER ESTATE WAGONS 1992 ROADMASTER SEDANS


CONDITION:

Some owners of 1991-92 Roadmasters may comment on a Service Engine Soon Light - Code 22 - Throttle Position Sensor low. Additional comments may include poor idle quality. These conditions 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 Roadmaster Service Manual.

2. If no problems are found using the normal 6E diagnostics, replace the TPS with a new TPS kit, P/N 17112679 per the procedure in Section 6E of the Roadmaster 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.