# Check engine light

**URL:** <https://community.cartalk.com/t/check-engine-light/44831>\
**Category:** Maintenance/Repairs\
**Tags:** cherokee, jeep\
**Created:** [February 20, 2010, 9:11pm UTC](https://community.cartalk.com/t/check-engine-light/44831 "2010-02-20T21:11:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tjroberts](https://avatars.discourse-cdn.com/v4/letter/t/e47c2d/32.png) [@tjroberts](https://community.cartalk.com/u/tjroberts)\
**Post date:** [February 20, 2010, 9:11pm UTC](https://community.cartalk.com/t/check-engine-light/44831/1 "2010-02-20T21:11:23Z")

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The codes for the check engine light when it has come on are :  
  
  
  
 P00472 & P0445  
  
 I have reset the lightindicator and it stays off for approx 60 miles then come back on. Thwe vehicle is a 2002 Jeep Grand Cherokee.  
  
 Can you tell me what is needed to repair or correct this problem?  
  
  
  
 Thnaks!

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [February 20, 2010, 10:04pm UTC](https://community.cartalk.com/t/check-engine-light/44831/2 "2010-02-20T22:04:34Z")

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For the P0445 (large EVAP leak), check the vacuum hoses which attach to the gas tank, charcoal canister, leak check pump, and to the engine. If the vacuum hose are long enough, you can cut the ends off, and re-attach. Check out Jeep forum.

Code P0472 is for "exhaust back pressure sensor circuit. Are you sure the code isn’t P0442 (small EVAP leak)?

Here is some good information on the EVAP system. The more you know, the more you can save on repairs. [http://autorepair.about.com/library/faqs/bl010h.htm](http://autorepair.about.com/library/faqs/bl010h.htm)

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**Author:** ![tjroberts](https://avatars.discourse-cdn.com/v4/letter/t/e47c2d/32.png) [@tjroberts](https://community.cartalk.com/u/tjroberts)\
**Post date:** [February 21, 2010, 8:17pm UTC](https://community.cartalk.com/t/check-engine-light/44831/3 "2010-02-21T20:17:42Z")

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Thank you very much for the information on the check engine light codes. The other code as you guessed it was P0442 not the P0472 that I typed.

Tom