# CODES PO202,302&172 need help!

**URL:** <https://community.cartalk.com/t/codes-po202-302-172-need-help/74303>\
**Category:** Maintenance/Repairs\
**Tags:** dodge\
**Created:** [August 26, 2012, 10:58pm UTC](https://community.cartalk.com/t/codes-po202-302-172-need-help/74303 "2012-08-26T22:58:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tevansiii06](https://avatars.discourse-cdn.com/v4/letter/t/57b2e6/32.png) [@tevansiii06](https://community.cartalk.com/u/tevansiii06)\
**Post date:** [August 26, 2012, 10:58pm UTC](https://community.cartalk.com/t/codes-po202-302-172-need-help/74303/1 "2012-08-26T22:58:22Z")

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I have a 2002 dodge 4.7L and I keep getting these three codes. I have changed all plugs, three coil packs for the cylinders that were misfiring, changed the TPS sensor due to that code coming up earlier, changed the IAC valve that helped a little and i just put sea foam through the system. With all of this done I still keep getting these three codes and the truck runs badly. I have looked around and haven’t been able to find any information on what else could be causing the problem. I would greatly appreciate some suggestions and direction. PO202 open cyl #2 PO302 misfire #2 and PO172 to rich bank #1.

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [August 26, 2012, 11:54pm UTC](https://community.cartalk.com/t/codes-po202-302-172-need-help/74303/2 "2012-08-26T23:54:02Z")

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P0202 Injector #2 control circuit.  
With the engine running you should have 12 volts on one injector wire and a ground pulse on the other wire. If this circuit checks out to be working replace the injector.

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<div class="post-metadata">

**Author:** ![tevansiii06](https://avatars.discourse-cdn.com/v4/letter/t/57b2e6/32.png) [@tevansiii06](https://community.cartalk.com/u/tevansiii06)\
**Post date:** [August 27, 2012, 1:22am UTC](https://community.cartalk.com/t/codes-po202-302-172-need-help/74303/3 "2012-08-27T01:22:45Z")

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Now there is some helpful information!!! will check that right now. THANK YOU Nevada\_545