# 2006 Cadillac SRX - P0437 Code

**URL:** <https://community.cartalk.com/t/2006-cadillac-srx-p0437-code/150282>\
**Category:** Maintenance/Repairs\
**Created:** [October 7, 2019, 9:50pm UTC](https://community.cartalk.com/t/2006-cadillac-srx-p0437-code/150282 "2019-10-07T21:50:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![darrellmosbrucker](https://avatars.discourse-cdn.com/v4/letter/d/bc8723/32.png) [@darrellmosbrucker](https://community.cartalk.com/u/darrellmosbrucker)\
**Post date:** [October 7, 2019, 9:50pm UTC](https://community.cartalk.com/t/2006-cadillac-srx-p0437-code/150282/1 "2019-10-07T21:50:49Z")

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po430 code change cats and sensors still comes on

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [October 7, 2019, 11:45pm UTC](https://community.cartalk.com/t/2006-cadillac-srx-p0437-code/150282/2 "2019-10-07T23:45:59Z")

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A code P0430 may mean that one or more of the following has happened:

The catalytic converter is no longer functioning properly  
An oxygen sensor is not reading (functioning) properly  
There is an exhaust leak

Of the 3 causes, the most expensive is replacing the cats. I’d have checked for an exhaust leak first, replaced the O2 sensor next, cat last.

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<div class="post-metadata">

**Author:** ![darrellmosbrucker](https://avatars.discourse-cdn.com/v4/letter/d/bc8723/32.png) [@darrellmosbrucker](https://community.cartalk.com/u/darrellmosbrucker)\
**Post date:** [October 10, 2019, 10:54pm UTC](https://community.cartalk.com/t/2006-cadillac-srx-p0437-code/150282/3 "2019-10-10T22:54:15Z")

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there is no exhaust leak did a smoke test on the exhaust you said to replace the sensors i just did the downstream do i need to do the up stream i also did a smoke test on the intake an there was smoke coming from the back of the intake manifold check the brake canister hose it was very soft and lose cut a little of the end of not as much smoke then i have ordered a new hose not here yet but usually a vacumm leak will cause the motor not idle good but it purrs like a kitten i will do another test after i install the new hose it may be a bad intake but that shouldn’t give a po430 code