Check engine with blue temp light flash??
09-03-2009, 12:49 AM
#1
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Posts: 77
Check engine with blue temp light flash??
2006 xA RS3
While in stopped traffic with A/c on check engine light came on and we noticed intermittent flash of the blue coolant temperature light, also noticed electric radiator fan was revving up in strange cycles.
After long cool down still have check engine,blue flash,fan motor revving.
Already have scan code list and planing trip to AutoZone in the morning for reading.
All fluids check out fine,motor runs smooth,belts good and so on,any ideas about the cause of this problem?
Many thanks in advance!
While in stopped traffic with A/c on check engine light came on and we noticed intermittent flash of the blue coolant temperature light, also noticed electric radiator fan was revving up in strange cycles.
After long cool down still have check engine,blue flash,fan motor revving.
Already have scan code list and planing trip to AutoZone in the morning for reading.
All fluids check out fine,motor runs smooth,belts good and so on,any ideas about the cause of this problem?
Many thanks in advance!
09-03-2009, 06:05 PM
#6
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Join Date: Jan 2007
Posts: 77
AutoZone could not get their scan gauge to physically connect,sent me to a repair shop and same thing again scan gauge would not physically connect.
Sent me to another foreign car repair shop 20 miles away,the guy wanted $85 to give me the scan code and diagnosis, I reluctantly agreed.
First meter he used connected but would not read anything "failed to read any data",guy said I'll go get a better one and came back with a tiny meter made by Mac Tools,he said it did not report any error codes,he used the meter to issue a reset command that turned off the check engine light temporally (It was back on before I got home about 22 miles)
The guy did not charge me anything and acted like he wanted nothing to do with fixing the malfunction.
Problem is same as before, but I have ruled out the fan motor and relay.The blue light flash and fan calls are coming from the cars computer.
Short of dropping $800-$1000 at the dealership
any other suggestions??
Sent me to another foreign car repair shop 20 miles away,the guy wanted $85 to give me the scan code and diagnosis, I reluctantly agreed.
First meter he used connected but would not read anything "failed to read any data",guy said I'll go get a better one and came back with a tiny meter made by Mac Tools,he said it did not report any error codes,he used the meter to issue a reset command that turned off the check engine light temporally (It was back on before I got home about 22 miles)
The guy did not charge me anything and acted like he wanted nothing to do with fixing the malfunction.
Problem is same as before, but I have ruled out the fan motor and relay.The blue light flash and fan calls are coming from the cars computer.
Short of dropping $800-$1000 at the dealership
any other suggestions??
09-05-2009, 08:04 PM
#8
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Thread Starter
Join Date: Jan 2007
Posts: 77
Dealer found:
Code P0118 = Engine Coolant Temperature Circuit High Input.
Rich the tech had me meet him in the work area and showed me the trouble code on his fancy laptop computer,He also pointed out part of the main wiring harness where it makes a 90 degree turn across the top of the engine this is where he pushed on it and was able to make the error code come and go at will just like a switch.
He told me it was a broken wire located within 6 inches from the radius of the 90 degree bend,He said it might be a easy fix or it could take hours to find the broken wire.
Brought the car home, me and the wife dissected the wiring harness in the suspect area and found a ugly crimp on connector covered with RTV and tape,this connection contained 5 white wires with a black stripe on them.
I cut out the entire connector,stripped all five wires and twisted them into one neat bundle,soldered that connection with rosin core solder ,tested the cars operation
,Reinsulated the wiring harness with high quality electrical tape and the black plastic coverings.
It's a done deal and we are back to normal for now.
Total cost $93.96
Thanks everyone !!
PS: Rich said this is a rare code/condition,I suspect this connector would not fail often but this splices placement so close to the active 90 degree bend is just asking for trouble,just very bad planning on someones part.
Code P0118 = Engine Coolant Temperature Circuit High Input.
Rich the tech had me meet him in the work area and showed me the trouble code on his fancy laptop computer,He also pointed out part of the main wiring harness where it makes a 90 degree turn across the top of the engine this is where he pushed on it and was able to make the error code come and go at will just like a switch.
He told me it was a broken wire located within 6 inches from the radius of the 90 degree bend,He said it might be a easy fix or it could take hours to find the broken wire.
Brought the car home, me and the wife dissected the wiring harness in the suspect area and found a ugly crimp on connector covered with RTV and tape,this connection contained 5 white wires with a black stripe on them.
I cut out the entire connector,stripped all five wires and twisted them into one neat bundle,soldered that connection with rosin core solder ,tested the cars operation
,Reinsulated the wiring harness with high quality electrical tape and the black plastic coverings.It's a done deal and we are back to normal for now.
Total cost $93.96
Thanks everyone !!
PS: Rich said this is a rare code/condition,I suspect this connector would not fail often but this splices placement so close to the active 90 degree bend is just asking for trouble,just very bad planning on someones part.
Last edited by Matt9876; 09-06-2009 at 11:24 PM. Reason: typo
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