I recently had some overheating problems on my v6, I changed my thermostat housing gasket because I thought I saw steam coming from the base when I checked out the engine. It still overheated after that so I checked my oil and found it was very low (I waited for a while after I turned off the car to check it). I then proceeded to add 2 quarts of oil and there was no more overheating. I figured it was all good so I began the 90 mile trip from school to home. With about 20 miles left in the trip the engine sputtered for a second then the check engine light came on (I was going about 70). The temperature and oil pressure seemed fine and the engine seemed to be fine so I just finished the trip. My oil level was near the top of the checkered area on my dipstick but still within the ok zone so I dont think I overfilled anything. Any suggestions as to what might be going on here?
IP: Logged
07:42 PM
PFF
System Bot
Cajun Member
Posts: 1597 From: Youngsville, La., USA Registered: Dec 2003
Likely to be code 32..just a guess, as that one seems to pop up periodically on my cars with no ill effect on drivability. If the light goes off and not return when you shut off then restart the car means to me 32. If it the SES light reappears, some other code.
The light still comes on after a few minutes upon start up. Today when I started it up cold it was really struggling and the engine would keep dropping below 500 rpms and then shoot back up to 1500, only after a little while it would even out.
*and no i haven't tried reading a code before
[This message has been edited by hinesb1890 (edited 11-25-2009).]
No. The CTS shares a common ground with the TPS, and the TPS shares a common reference signal with the MAP, but no direct connection between the MAP and the CTS.
As for your problem however, the service manual states that the CTS is one of the inputs that's used to control fuel delivery, engine spark timing, idle air control, torque converter clutch (for autos), and EGR. The code trips if the CTS senses a coolant temperature less than -30*C (-23*F) for 3 seconds or more, so I'd say your first step should be to check the CTS connector, it's on the pulley end of the engine on the intake manifold and has yellow and a black wire going to it. Unplug it, check for corrosion, replug it in, and try the engine. If it still trips the codes, then your CTS sensor is probably faulty. You can test it to see if it's reading properly with an ohmmeter. Here's what it should read between the two pins:
