I have a 1998 A4 2.8L the mlf light came on and doesn't shut off. A buddy of my check the code it show P0118 Coolant Temp sensor and P0332 Knock sensor..WTF are both the codes mean??

Also intermittly when a come a complete stop it feels like the abs kicks in..even thou the road is in good condition..brake pedal locks/release rapidly..

Info please......

 

Could be the temperature sensor.

 

P0332 = loose knock sensor, wiring short
P0118 = temperature sensor, thermostat sticking or both

 

check to see if you have a green temp sensor or black. if its black, relpace it with a green one. not sure about the knock sensor, but avant seems to know his stuff. abs could be a sensor losing communication. certain GM vehicles have preactivation of the abs when braking under 10mph due to corrosion buildup under the sensor. i have also seen extemely loose wheel bearing cause this during braking and turning.

 

under 15mph ish the abs is switched off so you could lock the wheels like the earlier cars ( speed sensitive ),
knock sensor if it came loose it would effect the cam sensor readings and would make the engine run rough ( timing issue )

 

Thanks guys for all the help, just a little more clear. i"m not that mechincally inclined. How many knock sensor is there?..and where is the rough location of the sensor?...and same questions for the temp sensor??

Soo this question is for (avant) if the knock sensor is loose would it cause hard to start...because i notice since the light was on..intermittly it hard to turn over...there is power, but turn-over is tough.


Thank you in advance for all your time guys...

 

You're temp sensor is probably bad esp since you're getting a hard hot start and that fault. It is under the hose from the mass air sensor to the throttle body. Remove that hose and you will see a connector on top of either a black or green sensor held in by a u-shaped plastic clip. Pull the clip (careful they break easy), pull the sensor out with the old o-ring, and replace it.

Your ABS kicking on while slowing down may be due to buildup on you ABS sensors or a cracked ABS wheel on one of your driveshafts. The best way to diagnose this is by using a dealership tool (sorry) that is dedicated to solving ABS problems.