# Bank 1 knock sensor

**URL:** <https://community.cartalk.com/t/bank-1-knock-sensor/80345>\
**Category:** Maintenance/Repairs\
**Created:** [July 15, 2013, 6:33am UTC](https://community.cartalk.com/t/bank-1-knock-sensor/80345 "2013-07-15T06:33:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![coley25](https://avatars.discourse-cdn.com/v4/letter/c/ac8455/32.png) [@coley25](https://community.cartalk.com/u/coley25)\
**Post date:** [July 15, 2013, 6:33am UTC](https://community.cartalk.com/t/bank-1-knock-sensor/80345/1 "2013-07-15T06:33:07Z")

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Someone please help me I replaced the upstream o2 sensor and now my check engine light is back on saying it is the bank 1 knock sensor is it really the knock sensor or is it something else throwing the code if someone could help me as soon as possible that’d be great

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**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\
**Post date:** [July 15, 2013, 7:06pm UTC](https://community.cartalk.com/t/bank-1-knock-sensor/80345/2 "2013-07-15T19:06:07Z")

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There are a number of knock sensor codes. I assume your code is something like P0325, which usually means the trouble is with wiring to the sensor and not with the sensor itself. Whenever a code refers to the sensor circuit the wiring to the sensor should be checked out first before throwing in a replacement sensor.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [July 15, 2013, 8:38pm UTC](https://community.cartalk.com/t/bank-1-knock-sensor/80345/3 "2013-07-15T20:38:59Z")

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You did item 6 but there are a few other possibilities.  
P0327- Possible Solutions  
1.Verify the resistance of the knock sensor (compare it to factory specs)  
2. Inspect for broken/frayed wires leading to the sensor  
3. Check the wiring and connections leading to/from the knock sensor and PCM/ECM  
4. Verify proper voltage is reaching the knock sensor (e.g. 5 volts)  
5. Verify proper grounding of sensor and circuit  
6. Replace the knock sensor  
7. Replace the PCM/ECM

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**Author:** ![RemcoW](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/remcow/32/2471_2.png) [@RemcoW](https://community.cartalk.com/u/RemcoW)\
**Post date:** [July 15, 2013, 10:42pm UTC](https://community.cartalk.com/t/bank-1-knock-sensor/80345/4 "2013-07-15T22:42:28Z")

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[http://www.obd-codes.com/p0327](http://www.obd-codes.com/p0327)