3 Codes Keep getting Throw, Any Ideas?
Thread Starter
Instructor
Joined: Oct 2008
Posts: 178
Likes: 0
From: Norman OK
3 Codes Keep getting Throw, Any Ideas?
The car is a 2002 coupe, it has been periodically throwing these codes mostly under hard acceleration. The idle seemed a little rough so the spark plugs were changed. The idle feels much better now and the car much more responsive. But the same codes are still being thrown. The codes are
P0327- Knock Sensor (KS) Circuit Front
PO332- Knock Sensor (KS) Circuit Rear
P1416 - AIR System Bank 2
Now the car won't take full acceleration, the engine will cut off at full throttle. But as soon as you let off full throttle it will accelerate slowly. Any ideas on what is causing those codes?
P0327- Knock Sensor (KS) Circuit Front
PO332- Knock Sensor (KS) Circuit Rear
P1416 - AIR System Bank 2
Now the car won't take full acceleration, the engine will cut off at full throttle. But as soon as you let off full throttle it will accelerate slowly. Any ideas on what is causing those codes?
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
The AIR code for the pass side is my guess--the P1416 suggests that you have an air leak or the right AIR check valve has malfunctioned--
Most likey that is the cause for the "low frequency codes on your sensors-- A stuck AIR valve or AIR leak can make strange exhaust noises--which are being picked up by your sensors--
I would start there---then clear the codes also check ALL the AIR hoses---make sure the one that goes onto the air cleaner box is hooked up---Check the AIR fuses in the panel--and i think there may be an AIR relay as well--
Most likey that is the cause for the "low frequency codes on your sensors-- A stuck AIR valve or AIR leak can make strange exhaust noises--which are being picked up by your sensors--
I would start there---then clear the codes also check ALL the AIR hoses---make sure the one that goes onto the air cleaner box is hooked up---Check the AIR fuses in the panel--and i think there may be an AIR relay as well--
Instructor
Joined: Aug 2006
Posts: 198
Likes: 0
From: Des Moines IA
PO3 codes are ignition or misfire codes.
The P14 code is a manfacturer specific emissions control code.
Go over the basics, like premium gas. There is a TSB for C5's that you must run top tier gas like Shell, Chevron, 76 etc. There is a whole list of gas stations that are accepted on that TSB. It could be something as simple as you going to a gas station consistently that has bad gas, that could cause it.
If all of that is ruled out, then insure that the spark plugs you got are obviously gapped correctly, or that they are manfacturer recommended.
start there, and then we can hopefully help in further diagnosis.
The P14 code is a manfacturer specific emissions control code.
Go over the basics, like premium gas. There is a TSB for C5's that you must run top tier gas like Shell, Chevron, 76 etc. There is a whole list of gas stations that are accepted on that TSB. It could be something as simple as you going to a gas station consistently that has bad gas, that could cause it.
If all of that is ruled out, then insure that the spark plugs you got are obviously gapped correctly, or that they are manfacturer recommended.
start there, and then we can hopefully help in further diagnosis.
Last edited by Show Stopper; Jun 16, 2010 at 11:40 PM.
