Got an SES light. Took it in and was told that my master cylinder was "leaking"..."nearly dry" and that my clutch was going to have to be replaced. Quoted me around $1800 to get it done. Guess I'll be driving the Chevy Volt loaner until next week

At this point I'm still stunned. Can't stand the idea of replacing a clutch after five years.

Noticed a few other posts about the P0806 code...but none seem to mention having to have the clutch replaced......

And...to make matter worse. A tropical storm/possible hurricane is heading for my town and dealership. Now I'm afraid they'll leave it outside all weekend...at the rate my luck is going....a tree will fall on it.

 

What is it that the code says? I've had a few faulty MC's on C6's. But never had to replace a clutch for any other reason than the motor outdoing the stock clutch capabilities.

 

P0806 is Clutch Position Sensor Circuit Range/Performance

This really isn't what it sound s like. This sensor tells the PCM whether you have the clutch pedal pushed in or not. It operates much like a Brake Switch and mounts above the clutch pedal in the same manner.

It does not mean the clutch is wore out or the slave is bad. The Clutch M/C could be bad and cause this problem by not allowing the pedal to return .

If I was you I would get a second opinion before any work is done, I smell a scam

 

I would look to see if the switch on the clutch pedal bracket has been damaged, you may even want to replace it. I doubt it has anything to do with the clutch itself. the tech may have kicked it when he was driving your car or if you have an after market master (Tick), it is not adjusted correctly.

 

That's what I'm afraid of.......

I also noticed that my cruise control stopped working consistently before the SES light came on. Perhaps the cruise wasn't working because it thought the clutch wasn't in the right position.....

 

Circuit/System Description

The clutch pedal position (CPP) sensor is a three wire sensor, connected to a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the CPP sensor, and also provides a sensor ground path on the low reference circuit. The CPP sensor sends a voltage signal to the ECM on the signal circuit. The voltage on the signal circuit will vary from a voltage less than or equal to 5 volts when the clutch pedal is released, to a voltage less than or equal to 1.5 volt when the clutch pedal is applied


Circuit/System Verification

Ignition ON, observe the scan tool CPP sensor percent parameter. The percentage should vary from 0 percent when the clutch pedal is released, to 100 percent when the clutch pedal is in the apply position.
Perform the CPP learn procedure. Refer to Clutch Pedal Position Sensor Learn .
Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Ignition OFF, disconnect the harness connector of the CPP sensor.
Ignition ON, observe the scan tool CPP sensor voltage parameter for 0.1-volt.
⇒ If the voltage is below the specified value, replace the CPP sensor.
⇒ If the voltage is above the specified value, replace the ECM.

Component Testing

Ignition OFF, disconnect the harness connector of the CPP sensor.
Measure the resistance between the signal terminal B and the low reference terminal A of the CPP sensor. Sweep the CPP sensor through the entire range. The resistance should vary low to high and high to low without any spikes or dropouts.
⇒ If the resistance is erratic with spikes or dropouts, replace the CPP sensor.

 

If the master cylinder is nearly dry you should be able to see that by looking under the hood. How did the clutch feel when you drove the car to the dealership? A leaking clutch master or slave cylinder could ruin your clutch. Clutch linings don't like having brake fluid dripping onto them.

The code may or may not be related to the clutch leak. It all depends on whether the pedal is positioning itself the same as it did before the leak. If you can still push it all the way down and it engages at the same point it always did the pedal position sensor should read properly unless there is something wrong with the sensor or the wiring going to it.

Bill

 

A malfunction in that switch will cause the cruise control to not work.

It's possible that your clutch pedal return spring broke, it is an overcenter spring that holds the clutch at the top of the travel and assists in pushing the clutch down. The pedal spring often breaks and then sometimes the clutch pedal doesn't always return all the way to the top.

See here for pics of the spring.

http://forums.corvetteforum.com/c6-t...ing-in-c6.html


I sincerely doubt you need a clutch. I would get a second opinion. These clutches are very robust. I've got 72,000 miles and 494 hard drag strip passes on mine. When a clutch is worn you will experience slipping in higher gears, floor it in 5th and instead of rpm and speed going up, only rpm goes up. You notice when your clutch is bad. If you don't have this symptom go elsewhere.