# 2003 Impala 3800 - PO481 OBDII code and door locks

**URL:** <https://community.cartalk.com/t/2003-impala-3800-po481-obdii-code-and-door-locks/53918>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, electrical-wiring, impala\
**Created:** [August 21, 2010, 5:04pm UTC](https://community.cartalk.com/t/2003-impala-3800-po481-obdii-code-and-door-locks/53918 "2010-08-21T17:04:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![statesup](https://avatars.discourse-cdn.com/v4/letter/s/5e9695/32.png) [@statesup](https://community.cartalk.com/u/statesup)\
**Post date:** [August 21, 2010, 5:04pm UTC](https://community.cartalk.com/t/2003-impala-3800-po481-obdii-code-and-door-locks/53918/1 "2010-08-21T17:04:40Z")

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Two problems…Check engine light with OBDII Code PO481: Cooling fan problem. Blown 25 amp fuse replaced twice. Runs hotter but does not overheat. Not sure if it is fan or relay.  
  
 Door locks and trunk release quit. Replaced 20 AMP fuse twice there too but problem re-occurs. Don’t know where to look on this one. Any suggestions?

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**Author:** ![statesup](https://avatars.discourse-cdn.com/v4/letter/s/5e9695/32.png) [@statesup](https://community.cartalk.com/u/statesup)\
**Post date:** [August 23, 2010, 3:22am UTC](https://community.cartalk.com/t/2003-impala-3800-po481-obdii-code-and-door-locks/53918/2 "2010-08-23T03:22:16Z")

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Bad fan. Replaced whole assembly today and all is well.