Throwing KOER code 225 question
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Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
Throwing KOER code 225 question
I tested the KOEO procedure and got no codes. Then I did the KOER procedure and got code 225 (with a ford code reader). All I can find out about the code is the knock sensor was not tested and to ignore it if truck is not pinging. I have NO pinging so is there anything else I should do at this point. My only symptom is idle is a little rough but I have been down that road with the experts. Any thing I should do now? Thank you. Sandy
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Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
Thank you. It runs very good. And I was kinda shocked I had a code. If that sensor would clean the idle just a little, I would replace it. Can it be checked with a meter?
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
DTC 225 indicates the Knock Sensor (KS) signal to the PCM was not sensed during the Dynamic Response Test in the Key On Engine Running Self-Test.
At altitudes of 6,000 ft and higher, the test may fail. If that happens, repeat the Goose Test several times. If DTC does not clear, proceed with this Pinpoint Test.
Possible causes:
-- Altitude of 6,000 ft or higher.
-- Damaged Knock Sensor.
-- Open or short in harness.
-- Damaged Powertrain Control Module (PCM).
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc.
At altitudes of 6,000 ft and higher, the test may fail. If that happens, repeat the Goose Test several times. If DTC does not clear, proceed with this Pinpoint Test.
Possible causes:
-- Altitude of 6,000 ft or higher.
-- Damaged Knock Sensor.
-- Open or short in harness.
-- Damaged Powertrain Control Module (PCM).
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc.
Thread Starter
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Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
DTC 225 indicates the Knock Sensor (KS) signal to the PCM was not sensed during the Dynamic Response Test in the Key On Engine Running Self-Test.
At altitudes of 6,000 ft and higher, the test may fail. If that happens, repeat the Goose Test several times. If DTC does not clear, proceed with this Pinpoint Test.
Possible causes:
-- Altitude of 6,000 ft or higher.
-- Damaged Knock Sensor.
-- Open or short in harness.
-- Damaged Powertrain Control Module (PCM).
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc.
At altitudes of 6,000 ft and higher, the test may fail. If that happens, repeat the Goose Test several times. If DTC does not clear, proceed with this Pinpoint Test.
Possible causes:
-- Altitude of 6,000 ft or higher.
-- Damaged Knock Sensor.
-- Open or short in harness.
-- Damaged Powertrain Control Module (PCM).
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc.
Thank you Subford. My altitude is 100' Gulf of Mexico. I hammered around the block after reading about the code. Idle never dropped. I will run the test again today just to make sure I goosed it good. If the code repeats, can the knock sensor be checked or do I just replace it. My PCM has been replaced and is still under warranty if I have to go that far. Look forward to your response. Thanks Sandy
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
There is no way to check a knock sensor that I am aware of. You already found out using a hammer to replicate pinging was an exercise in futility.
Good luck finding a replacement. Even aftermarket support for them evaporated a few years.
If you do not experience pinging under normal operation, leave it alone.
Good luck finding a replacement. Even aftermarket support for them evaporated a few years.
If you do not experience pinging under normal operation, leave it alone.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
If you do not experience pinging under normal operation, leave it alone.[/QUOTE]
Thanks Randy. My Bro in law tells me that so much he just uses LIA.
Thanks Randy. My Bro in law tells me that so much he just uses LIA.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
If there is a possibility of improvement, I have my old PCM and I think it is good. I could try that if you think it is worthwhile. I can always change back. ?????
HardScrabble
That code means your bed is on crooked.
Oh man that is cold. I should have known I guess. I was going to tell you about zax for your scrabble but now I'm not.
HardScrabble
That code means your bed is on crooked.
Oh man that is cold.
I should have known I guess. I was going to tell you about zax for your scrabble but now I'm not.
Cargo Master
Joined: Jun 2013
Posts: 3,176
Likes: 15
From: Somewhere n North America
Sandymane, hope you are well. Same truck with the higher than normal idle?
I get that Code when I don’t get a good WOT during test.
I have chucked up a knock sensor in a vice, beat a hammer on the vice and got some sort of a reading out of the sensor, I don’t remember if I was measuring Vac or Frequency. If you bored, you can give this a go.
Also, you can take a few measurements at the Knock Connector to check those two wires, KOEO. The Yellow/Red side of the connector from EECM may have about 2-3vdc (from memory) Some books say 1-4vdc.
The Gray/Red side goes to Signal Return. You can put your meter leads on each pin of the connector to measure.
I get that Code when I don’t get a good WOT during test.
I have chucked up a knock sensor in a vice, beat a hammer on the vice and got some sort of a reading out of the sensor, I don’t remember if I was measuring Vac or Frequency. If you bored, you can give this a go.
Also, you can take a few measurements at the Knock Connector to check those two wires, KOEO. The Yellow/Red side of the connector from EECM may have about 2-3vdc (from memory) Some books say 1-4vdc.
The Gray/Red side goes to Signal Return. You can put your meter leads on each pin of the connector to measure.
Thread Starter
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Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
Sandymane, hope you are well. Same truck with the higher than normal idle?
I get that Code when I don’t get a good WOT during test.
I have chucked up a knock sensor in a vice, beat a hammer on the vice and got some sort of a reading out of the sensor, I don’t remember if I was measuring Vac or Frequency. If you bored, you can give this a go.
Also, you can take a few measurements at the Knock Connector to check those two wires, KOEO. The Yellow/Red side of the connector from EECM may have about 2-3vdc (from memory) Some books say 1-4vdc.
The Gray/Red side goes to Signal Return. You can put your meter leads on each pin of the connector to measure.
I get that Code when I don’t get a good WOT during test.
I have chucked up a knock sensor in a vice, beat a hammer on the vice and got some sort of a reading out of the sensor, I don’t remember if I was measuring Vac or Frequency. If you bored, you can give this a go.
Also, you can take a few measurements at the Knock Connector to check those two wires, KOEO. The Yellow/Red side of the connector from EECM may have about 2-3vdc (from memory) Some books say 1-4vdc.
The Gray/Red side goes to Signal Return. You can put your meter leads on each pin of the connector to measure.
Makes good sense to run the KOER test again before I pull the PCM. I think when you were helping me I made a mistake or maybe two,
so I should probably run the test again. Thanks for the idea. If it doesn't go away I will try the PCM and if the code still appears I will do the info you provided. Thank you again for your help. Sandy
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Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
I ran the KOER test twice today and got the 225 both times. I plugged in my old PCM in and still got the 225. In reading, my understanding of the Knock sensor symptoms do not apply to me. The truck runs great with a little roughness at idle but livable. Should I do anything else like what was suggested by VJsimone or just leave it alone? If I am not causing future problems and it won't fix the idle, I would LIA. Sandy