I replaced my water pump and temp sensor on my 2013 Audi A4 Quattro with OEM water pump and temp sensor. I noticed a crack on my temp sensor...

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Customer

I replaced my water pump and temp sensor on my 2013 Audi A4 Quattro with OEM water pump and temp sensor. I noticed a crack on my temp sensor connector, so I replaced the connector. I bleed the coolant system and replace the coolant with OEM coolant (Purple in Color). I put everything back together, start my car and check engine light comes on. I get my scan tool to check for code. I get code P0118. This code is for bad temp sensor or faulty wiring. I have new temp sensor, I replaced temp connector, I test connector wiring for 5V REF. I am getting very reading on the multimeter and the scan tool is indicating -40 degrees for ECT.Why am I getting such a high reading on temp sensor connector?

Last updated
Ramy De Jesus
Audi Mechanic

Hello and welcome to ExpertHelp.com! My name is Ramy De Jesus and I'm going to do everything in my power to answer your question to your full satisfaction!

Before we get started, I want to remind you ExpertHelp.com is an independent professional support company. We are not associated with AUDI nor are we paid to provide support on their behalf. However, we have helped hundreds of customers with similar questions and believe we can help you too. OK, let’s get started! :)

I’m available to chat now. Please let me know that you are ready by posting a response. I’ll leave my chat session open for the next 15 minutes or so and wait for your reply. If I don’t catch you this time, please respond with a few times (including your timezone) that work best for you and we can connect then.

Last updated
Ramy De Jesus
Audi Mechanic

Hi Alonzo! Thank you for choosing ExpertHelp.com. May I know if this is the first time you encounter this error code? When you use you scan tool did you clear the error code you are getting and then try to see if you still getting the same error code? If not try to clear the code and then run the Audi again and see if you will be getting the same error code.  When your ready, please type your responses on this page and then click on the Blue Send Response button to post your response. I will be standing by for your response.

Posted
Ramy De Jesus
Audi Mechanic

As it turns out, I am scheduled to go offline now. I would really appreciate the opportunity to personally make sure you are satisfied with your answer and if it's OK with you, I'd like to continue our conversion 10 AM CST.

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Customer

Hello,

Are you online?

 

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Customer

Hi Ramy,

I am online.  Please let me know when you are available. Thank you.

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Ramy De Jesus
Audi Mechanic

Hi Alonzo,

Thank you for your response. Have you tried clearing the error codes using your scanner tool that you used? I will be waiting for your response.

 

Regards,

Ramy De Jesus

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Customer

Hi Ramy,

I did clear check engine code.  I turned car on again and it came back on.

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Customer

I have never had this code before.  This code only occurred after I replaced water pump.

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Ramy De Jesus
Audi Mechanic

I see. Can you try to remove the negative connector that is connected to your car battery for five minutes and then try to connect it again. Then try to start it again and have it run for 15 minutes and advise me if the error code will still occur. I will be standing by for the result.

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Customer

I will do it now.

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Ramy De Jesus
Audi Mechanic

I will be standing by for your updates.

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Customer

ok

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Customer

I disconnected negative terminal.  I will give it 5 mins.

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Ramy De Jesus
Audi Mechanic

Copy that Alonzo I will be standing by.

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Customer

Turned on the ignition. Check engine light is on.

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Ramy De Jesus
Audi Mechanic

I see. Now can you use the scanner and try to clear the check engine light.

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Customer

yes.  will do.

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Ramy De Jesus
Audi Mechanic

Okay. I will be standing by.

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Customer

Check engine light cleared on the dashboard. But on the scan tool, it is showing yellow light. EGR, CAT, EVAP, HTR are blinking red.  But the check engine light is gone.  Temp sensor is -40 degree.

Posted
Ramy De Jesus
Audi Mechanic

Can you try this. Disconnect the negative connector of the batter for 5 minutes again. After 5 minutes connect it again and then turn on and turn off the ignition 5 times but do not turn on the engine. After that start the car again and have it run for 15 minutes and advise me what will be the result.

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Customer

got it!

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Ramy De Jesus
Audi Mechanic

Update me once your done. I will be standing by.

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Customer

Hi Ramy,

I have finished letting the car run for 15 mins.

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Ramy De Jesus
Audi Mechanic

I see. Advise me what will be the result or if you will still be getting any error code on your dash okay. :)

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Customer

I have no check engine light on.  The real test is when I turn the ignition on again, will the check engine light be off.  :)

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Ramy De Jesus
Audi Mechanic

Turn it of for five minutes and then start the car again and drive it a couple of blocks and then advise me what will happen. I will be standing by.

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Customer

I turned on the car.  Check engine light was on and stayed on.  Fan immediately came on. But, the fan has been doing this since I got the PO118 code. I drove around my neighborhood with the A/C on. I experienced no stalls, no loss of power. I switched from normal drive to sport drive, no loss of power.

     
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Customer

Fans turned off, as soon as I turned off car.

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Ramy De Jesus
Audi Mechanic

I see. Have you check if there is an open in the ground circuit between the ECT sensor and PCM? If there is not then can you try to clear the check engine again and then start the car and let it run and drive it again.

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Customer

I have checked ECT connector.  I replaced the ECT connector with a new connector.   I have a question for you.   ECT connector has Blue/ w White Stripes and Brown/ w White Stripes wire coming from the ECM to the ECT connector. Do you know which wire is positive?  Which wire is the negative or ground?   I have tested both connectors, but I am not getting a 5V Ref.   I am actually getting 12V, 51 V, 160 V on Blue wire.  Yes, I looked at ECM. I took apart the ECM

             
             

unit. No rust, No bent pins, No moisture.  I did not test ECM, I wasn't sure on how to do a proper test.

Posted
Ramy De Jesus
Audi Mechanic

Not sure about what color which is the positive wire. If you replace them and just follow the same wire that is connected previously with the old one that will not be a problem. Is the engine light still on?

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Customer

yes, engine light is still on.  I did follow the same sequence for connectors.

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Ramy De Jesus
Audi Mechanic

Try to clear the check engine again then drive it again a couple of blocks and then advise me what will happen.

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Customer

Hi Ramsey,

 I cleared out code. I drove the car around the neighborhood.  Fans turned on.  No other issues.

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Ramy De Jesus
Audi Mechanic

Great! Is there anything else I can assist you with Alonzo?

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Ramy De Jesus
Audi Mechanic

 

Are you still there Alonzo? Is there anything else I can assit you with?

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Customer

Ramsey,

I turned the car on again. Check engine light still comes on.

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Customer

Do you think I have a bad ECM?

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Ramy De Jesus
Audi Mechanic

I see. Possible since we did every possible thing to resolve the issue but the engine still coming on.

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Ramy De Jesus
Audi Mechanic

Possible since we did every possible thing to resolve the issue but the check engine still coming on.

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Customer

yes,   I clear  check engine light.  Next ignition turn, it comes back on.

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Customer

Do you know how to test wires from ECM to Temp Sensor?

 

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Ramy De Jesus
Audi Mechanic

The best way now is to go to the best mechanic and have your ECM check. 

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Customer

got it!     Ramsey, thank you for all your assistance today. You have been "Awesome".  Thanks again.

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Ramy De Jesus
Audi Mechanic

Is there anything else I can assist you with?

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Customer

No, good sir!

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Ramy De Jesus
Audi Mechanic

Please do not forget to click on the Green Accept Answer button for me to receive a credit for assisting you. Thank you for allowing us to help you.

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Ramy De Jesus
Audi Mechanic

Dear Alonzo, It was a pleasure helping you with your AUDI issue today. Here is a summary of the resolution.

Issue identified : Error code P0118
Solution Implemented : Chat with customer. Provide all possible steps to resolve the issue through the chat page. Customer follow all directions and the P0118 is remove but the engine light is still on. Advise customer to have the ECM check. Customer appreciate our assistance. Customer accept the answer. Customer provided a tip. Chat ended.
If issue resurfaces : Advised to contact us at s**t@experthelp.com or call us on our support number ***-***-**** )

Posted
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