alright so i just pulled three codes out of the 98 max

0901- front right 02 htd sensor heater
1001 - front left 02 htd sensor heater
and 0304 - which is the knock sensor

now heres my problem.... when i start my car it idles very high at about 1200 rpm until the temp gauge rises to normal....

what do i need to do?????

thanks a lot
Zubair

 

When you start your car, its normal to have it idle ~1100-1200.

When am at a stop light it idles ~600.

 

If you want to save money on gas, Replace your O2 sensor that are coming bad. And if you want to get a better performance, Replace your Knock Sensor.

 

do ur o2 sensors first they might be setting the KS code

 

As Cal0205 noted your idle seems normal.

For the ecu codes, you are looking at least $200 in parts for both O2 and knock sensors. You can do the job yourself and it should take ~1 hour or less.

Here is a little tip for the O2 sensor codes. Clean the inside of the plug that connects the O2 sensor to the car's wiring with rubbing alcohol. For example, disconnect the front O2 plug behind your radiator. Take a Q-tip and dip it into the rubbing alcohol. Now, use the Q-tip and clean out the inside of the plug. Over time, dirt will get into the connector, even with the rubber washer in place, and can cause malfunctions to either throw out your 1001 or a 0413 ecu codes. Once you have cleaned out the plug, connect it back and clear your ecu codes. If O2 sensor is really bad then code will come back immediately. If it does not then it may possibly be the dirty wiring causing the problem and you just saved yourself some money for the time being. You can pretty much apply this maintenance step to all connectors inside your engine bay to prevent possible problems caused by dirt/dust.