Originally Posted by cpufreak3
Hi everyone, looking for some help with my G35 coupe. I have no CEL but there is a pending Knock Sensor code (P0327). Car runs fine, no problems with gas mileage. No other codes. I cleared the code and in comes back almost immediately upon starting the car, again as a pending code. What is going on? Is there really a problem with the knock sensor and/or harness? Is there another problem?
Originally Posted by TheGuyGuy
I have the same code no C.E.L. It seems that the acceleration and fuel economy is fine as well. I was reading a thread where it said something about them replacing the sensor and it did nothing, but throw a different code: P0328 Knock sensor high signal something or other. I guess there was a wiring harness underneath that attached to another that wasn't plugged in all the way. I haven't tried clearing my codes yet to see if it comes back. Maybe I'll try that today.
I'm always amazed that prior to posting on this forum many seem to fail to read the FSM for their vehicle.
Take out your multi-meter and do some troubleshooting
Start on page EC-290
DTC P0327, P0328 KS
Specification data are reference values and are measured between each terminal and ground.
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 15 and ground. Refer to Wiring Diagram.
It is necessary to use an ohmmeter which can measure more than 10 M
4. Also check harness for short to ground and short to power.
OK or NG
>> GO TO 4.
>> GO TO 2.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 15 and knock
sensor terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
>> GO TO 4.
>> GO TO 3.
DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F37, F229
Harness for open or short between ECM and knock sensor
>> Repair open circuit or short to ground or short to power in harness or connector
If you don't have the skills to do proper troubleshooting then pay to have the dealer diagnose your problem.