Knock Sensor CEL

[OC455]

Well,
At a little over 44k miles, my truck threw a CEL on Saturday. Had a friend of mine with a code scanner check it and it had 3 codes that showed.

He said the codes were for a knock sensor. I'm like great, how much are those to get fixed. Not expensive but apparently it resides under the intake manifold.....ugh.

I asked him what usually causes the knock to happen and he said the sensor can go bad, computer issues, and it could be running in a lean condition.

I said let's go check the truck real quick...I popped the air filter box open....this is what I found.
Shame on me for not thinking about changing the air filter after the first year or so. The air filter on the left was the original. The new one is a Purolator. Will have everything checked probably by tomorrow.

 

[Wild one]

Well,
At a little over 44k miles, my truck threw a CEL on Saturday. Had a friend of mine with a code scanner check it and it had 3 codes that showed.

He said the codes were for a knock sensor. I'm like great, how much are those to get fixed. Not expensive but apparently it resides under the intake manifold.....ugh.

I asked him what usually causes the knock to happen and he said the sensor can go bad, computer issues, and it could be running in a lean condition.

I said let's go check the truck real quick...I popped the air filter box open....this is what I found.View attachment 563037
Shame on me for not thinking about changing the air filter after the first year or so. The air filter on the left was the original. The new one is a Purolator. Will have everything checked probably by tomorrow.

The knock sensors are located on the side of the block on the 5.7's and 6.4's,not under the intake.All you have under the intake are the mds and vvt solenoids,and an egr cooler on the truck 6.4's.

On a Ram 2500 with the 6.4L Hemi engine, the knock sensors are located on the driver's side and passenger side of the engine block, near the exhaust manifolds.

Here's a more detailed breakdown:

• Location:
  The sensors are positioned on the engine block, one on the driver's side and one on the passenger side, near the exhaust manifolds.
  
  
• Access:
  To access them, you might need to remove the wheel well access panel or access them from underneath the vehicle.
  
  
• Function:
  Knock sensors detect engine knocking, which can damage the engine, and alert the engine control unit (ECU) to adjust the ignition timing to prevent damage.
  
  
• Troubleshooting:
  A faulty knock sensor can cause a check engine light (CEL) to illuminate and a diagnostic trouble code (DTC) to be stored.
  
  
• Troubleshooting codes:
  A P0325 code indicates a knock sensor malfunction, while P0330 indicates a problem with the knock sensor 2 circuit.

 

[OC455]

The knock sensors are located on the side of the block on the 5.7's and 6.4's,not under the intake.All you have under the intake are the mds and vvt solenoids,and an egr cooler on the truck 6.4's.

On a Ram 2500 with the 6.4L Hemi engine, the knock sensors are located on the driver's side and passenger side of the engine block, near the exhaust manifolds.

Here's a more detailed breakdown:

• Location:
  The sensors are positioned on the engine block, one on the driver's side and one on the passenger side, near the exhaust manifolds.
  
  
• Access:
  To access them, you might need to remove the wheel well access panel or access them from underneath the vehicle.
  
  
• Function:
  Knock sensors detect engine knocking, which can damage the engine, and alert the engine control unit (ECU) to adjust the ignition timing to prevent damage.
  
  
• Troubleshooting:
  A faulty knock sensor can cause a check engine light (CEL) to illuminate and a diagnostic trouble code (DTC) to be stored.
  
  
• Troubleshooting codes:
  A P0325 code indicates a knock sensor malfunction, while P0330 indicates a problem with the knock sensor 2 circuit.

Well.....that's good to know now. Going to have to get under and start checking everything out now. Hopefully it isn't wiring *****'d or the sensor corroded out. Ill get it to the shop to have a look.

 

[Wild one]

Well.....that's good to know now. Going to have to get under and start checking everything out now. Hopefully it isn't wiring *****'d or the sensor corroded out. Ill get it to the shop to have a look.

There should be a tin shield covering them,at least on the 5.7's and car 6.4's there is,so i'd guess it'll be the same on the truck 6.4's.They should be located slightly behind the motor mounts,about 1/2 way up the side of the block

 

[Wild one]

The knock sensors are very sensitive to bolt torque,and you're better off under torquing them,then over torquing them.


For a 2018 Ram 2500 with the 6.4L Hemi engine, the torque specification for the knock sensor is 15 ft-lbs (20 Nm).

 

[OC455]

I appreciate the help @Wild one