Cooling System - MIL ON DTC P0480/P0481 (Police Veh): Overview
TECHNICALBulletin No.: 09-06-03-007A
Date: February 01, 2012
Subject: Malfunction Indicator Lamp (MIL) Illuminated, DTC P0480 and/or P0481 Set - Temperature Gage Indicates Hot - Cooling Fans Intermittent or Inoperative (Install Revised Cooling Fan Relay and Harness Assembly)
Models:
2006-2009 Chevrolet Impala Police Sedan (RPO 9C1 Only)
2010 Chevrolet Impala Police Sedan Equipped With RPO 9C1 and Without RPO WRH
2011 Chevrolet Impala Police Sedan Equipped With RPO 9C1 and/or 9C3 and Without RPO WRH
Supercede:
This bulletin is being revised to add the 2011 model year. Please discard Corporate Bulletin Number 09-6-03-007 (Section 06 - Engine/Propulsion
System).
Condition
Some customers may comment that the instrument panel temperature gage indicates hot.
Some customers may also comment that the malfunction indicator lamp (MIL) is illuminated.
The technician may observe that DTC P0480 and/or P0481 are set as current or in history and/or the engine cooling fans are intermittent or inoperative.
Cause
This condition may be caused by high underhood bussed electrical center (UBEC) temperatures which may result in the cooling fans becoming intermittent or inoperative under certain operating conditions.
Disclaimer