Please look in and help me.
Thread Starter
Instructor
Joined: Sep 2006
Posts: 227
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From: WALDORF MD
Please look in and help me.
For the last three week may car has been in my garage, with a high temp reading. I started a post about two weeks ago, but had no luck with the few suggestions. My problem is my temp goes all the way to high and reads xxx on the dic. The car is not running hot. The temp will show 79 degrees and then just jump up. I have replaced my temp sensor twice, I have checked ever fuse, I have taken the intake back off and reinstalled it(I had it off about 500miles before the problem to install headers), I replace the ECM. I need someones help or a good mech in the DC/VA/MD area. Please can someone help me
Racer
Joined: Feb 2006
Posts: 295
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From: Riverside California
Thread Starter
Instructor
Joined: Sep 2006
Posts: 227
Likes: 0
From: WALDORF MD
Dic reads 79 to 89 for about 5seconds then say xxx, I have reset codes which are p0118. And the other suggestions was, to clear codes, new temp sensor, new ecm, unhook battery and let set for 24hours. P0118 has something to due with temp sensor high voltage.
Melting Slicks
Joined: Jun 2007
Posts: 2,537
Likes: 3
From: Chester County PA
St. Jude Donor '08
[QUOTE=procs2v;1562061889]Dic reads 79 to 89 for about 5seconds then say xxx, I have reset codes which are p0118. And the other suggestions was, to clear codes, new temp sensor, new ecm, unhook battery and let set for 24hours. P0118 has something to due with temp sensor high voltage.[/QUOTE.
P0118= engine coolant temp sensor high voltage.
Have you checked the connector, or replaced the sensor?
P0118= engine coolant temp sensor high voltage.
Have you checked the connector, or replaced the sensor?
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
For the last three week may car has been in my garage, with a high temp reading. I started a post about two weeks ago, but had no luck with the few suggestions. My problem is my temp goes all the way to high and reads xxx on the dic. The car is not running hot. The temp will show 79 degrees and then just jump up. I have replaced my temp sensor twice, I have checked ever fuse, I have taken the intake back off and reinstalled it(I had it off about 500miles before the problem to install headers), I replace the ECM. I need someones help or a good mech in the DC/VA/MD area. Please can someone help me
Since you had intake off, did you burp your cooling system to make sure there in no air bubbles in it.
Also check all of your wiring harnesses for freying or possible knicks that could cause short.
Burning Brakes
Joined: Jul 2007
Posts: 881
Likes: 2
From: hill billy hell
Maybe wires instead of sensor
First thing I would do is get a multi meter,unplug the connector at the ECT and check each connector/wire. I believe the yellow wire should have 5v the brown should have nothing. It does sound like you have a short. fun part is finding it.
Hopefully you are not damaging the sensor when install.
Hopefully you are not damaging the sensor when install.
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Burning Brakes
Joined: Jul 2007
Posts: 881
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From: hill billy hell
My problem is my temp goes all the way to high
new sensor, coolant is fine, all wires ok.
If the PCM detects an excessively high ECT signal,voltage, which is low temperature indication DTC P0118 sets(manual)
Last edited by jirasvet; Sep 26, 2007 at 04:02 PM.
Pro
Joined: Jun 2005
Posts: 593
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You dod not mention what year the car is but if the battery has leaked acid it can seep into the main wiring harness and cause weird wiring issues.
Also try a OBD-II scanner and cross check what the PCM directly says versus the gauge to determine if something is wrong with IPC.
Does the DIC and water temp gauge agree in temp value ?
There is a main ground off the left back side of engine to frame, if that ground is flaky can cause weird IPC problems
Measure the wires on sensors could be a weak ground wire
Also try a OBD-II scanner and cross check what the PCM directly says versus the gauge to determine if something is wrong with IPC.
Does the DIC and water temp gauge agree in temp value ?
There is a main ground off the left back side of engine to frame, if that ground is flaky can cause weird IPC problems
Measure the wires on sensors could be a weak ground wire