S10/T10 P/U 2WD L4-151 2.5L (1988)
Oxygen Sensor: All Technical Service Bulletins
Engine - Intermittent Roughness/MIL ON/Codes Set
Number:
91-353-6E
Section:
6E
Date:
JUNE 1991
Corporate Bulletin No.: 136513
Subject:
INTERMITTENT ENGINE ROUGHNESS, CEL CODE 13 AND 44
Model and Year:
1988-91 S TRUCKS WITH 2.5L ENGINE
Condition:
A customer may comment of an engine roughness or CEL (check engine light) with a stored code of either 13 (02 sensor failure) or 44
(02 sensor lean). This could be an intermittent condition.
