False DTC P0461, Fuel Level Sensor, Set in VCM

File In Section: 6E - Engine Fuel & Emission

Bulletin No.: 66-65-04

Date: April, 1996

Subject:
False DTC P0461, Fuel Level Sensor (Class D), Stored in VCM (Reprogram VCM)





Models:
1996 Chevrolet and GMC S/T Models with 4.3L Engine (VINs W, X - RPOs L35, LF6) Built Prior to the VIN Breakpoints:

Condition

Diagnostic Trouble Code (DTC) PO461 stored but no problem reported or found with the fuel gauge reading.

Cause

The Vehicle Control Module (VCM) program is incorrect.

Correction

Reprogram the VCM using the new calibration available on your Techline Terminal CD # 1 (1996) or later.

Service Procedure

1. Use Tech 1 to check the calibration number.

2. Vehicles with old calibration should be reprogrammed with new "FLASH" calibration following the Service Manual procedure in Section 6E, Engine Controls.

Old Calibration New Calibration

16235505 16237015

Warranty Information

For vehicles repaired under warranty, use:

Labor
Operation Description Labor Time

J6355 Reprogram Use Published Labor
EEPROM Operation Time

Important:
Labor operation is coded to base vehicle coverage in the warranty system.