K 1500 Truck 4WD V8-5.3L VIN T (2000)
Oxygen Sensor: All Technical Service Bulletins
VCM - MIL ON/DTC P0141/P0161 Set
Bulletin No.:
00-06-04-006
File In Section:
06 - Engine/Propulsion System
Date:
February, 2000
Subject:
Service Engine Soon Lamp On with DTCs P0141 and/or P0161 (Reprogram VCM)
Models:
2000 Chevrolet and GMC C/K Models (Silverado and Sierra)
with 4.8L or 5.3L V8 Engine (VINs V, T - RPOs LR4, LM7)
Built prior to the following VIN breakpoints:
Assembly Plant
Division
VIN Breakpoints
Oshawa
Chevrolet
2GCEC19V8Y1226868
Oshawa
GMC
2GTEK19T9Y1226878
Condition
Some customers may comment about the Service Engine Soon lamp being illuminated with no other driveability concerns noticed. When investigating,
the technician may find one or both of the following stored codes.
^
DTC P0141 (H02S Heater Circuit Bank1 Sensor2)
^
DTC P0161 (H02S Heater Circuit Bank2 Sensor2)
Cause
The engine diagnostic was not robust enough to account for variability in H025 heater warm up time. Vehicle emissions are not affected by this
condition.
Correction
Verify that the DTC is not the result of an inoperative component, or a related wiring/other condition. Reference the Service Manual diagnostics as
