Crankshaft Position Sensor
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AudiWorld Newcomer
Joined: May 2011
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Crankshaft Position Sensor
Hello All,
I am new to the forum. I always search through when I have questions or curiosities about my 2004 A4. Now it's official, I'm in! Anyhow, about two weeks ago I replaced my CPS after the car shut off on me several times on the highway as the car idled in traffic. The car ran great after that and the check engine and EPC light shut off automatically. This morning the CEL popped back on again so I went to the Auto parts store and had them plug in the scanner to retrieve the error. The code it returned was P0321. I researched a bit online and found out this has to do with the speed sensor (same thing as CPS, at least that's what I read). The car isn't acting weird, rpm's are normal, car isn't shutting off. I would expect no issues since I just replaced the CPS. Anyhow, I'm concerned because I thought I had nipped this one in the bud. Thoughts?
I am new to the forum. I always search through when I have questions or curiosities about my 2004 A4. Now it's official, I'm in! Anyhow, about two weeks ago I replaced my CPS after the car shut off on me several times on the highway as the car idled in traffic. The car ran great after that and the check engine and EPC light shut off automatically. This morning the CEL popped back on again so I went to the Auto parts store and had them plug in the scanner to retrieve the error. The code it returned was P0321. I researched a bit online and found out this has to do with the speed sensor (same thing as CPS, at least that's what I read). The car isn't acting weird, rpm's are normal, car isn't shutting off. I would expect no issues since I just replaced the CPS. Anyhow, I'm concerned because I thought I had nipped this one in the bud. Thoughts?
AudiWorld Super User
Joined: Feb 2010
Posts: 3,066
Likes: 37
From: Fort Worth, Tx
It may be left over from when you were having the issues with it, i.e. I believe the ECU stores codes until they are cleared by a VAGCOM. I suspect the current CEL is due to something else.
Just FYI, in Audispeak, the "CPS" is know as an engine speed sensor (G28 sensor).
Just FYI, in Audispeak, the "CPS" is know as an engine speed sensor (G28 sensor).
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