Hi guys, I couldn't find the answer to this one. My check engine light is on, socket B2 give me 1-2-2 and socket 6A gives me 1-4-3.

Anyone know what these are. Also if anyone has a list of all the codes for the 940 that would help me out alot.

 

here's a list of codes

http://www.volvoclubofbc.com/technical/systemfaultcodes.html

 

so its appears to be the knock signal and air temp sensor

 

Would this mean the sensors need to be replaced? or does it mean they are detecting erros? (I know its a stupid question but I'm a newb trying to learn).

 

from vlvworld.com

"2.9.6 Knock Sensor

The knock sensor is mounted under the intake manifold near cylinder number 2. It's purpose is to sense knocking (preignition) on the engine and retard the timing accordingly. It is a difficult part to test without an osciliscope. Some mechanics suggest tapping the manifold or engine whist checking the timing to see if it retards. However, this is not recomended and hardly a reliable test.

However, the sensor cicruit can be tested: with the ignition key ON, but the engine not running, check the voltage, it should be between 1.5 and 5.0 volts.
When checking or reinstalling a knock sensor it should be tightened to 8-11 ft-lbs of torque. A loose or excessively tight sensor will not work effectively as it will be oversensitive or ineffective."