2009 FEH wrench light P0A7C

  #1  
Old 09-22-2018, 08:48 AM
Enthusiast
Thread Starter
Join Date: Apr 2015
Location: Effingham Illinois
Posts: 13
Default 2009 FEH wrench light P0A7C

Hello everybody,

I have a 2009 Escape Hybrid with 126k miles. It runs and drives great in town and on short trips. When I get on the interstate and drive 30 minutes/miles or so, the wrench light activates and the P0A7C code is set, its the only code I am getting. I have coolant flow at the bottle and the mecs pump is running(not sure if its weak and dying , flow seems low at the bottle) I took the FEH to ford and had them reprogram the ECM to the latest softwar as per the TSB but it hasn't corrected the issue. We drove an a long cross country trip and it did the SSN once at the 8 hour mark of driving. I shut it off and it restarted and the wrenchlight stayed off until the 30 minute/mile mark again. Kind of stumped as to what to look at next....I did check the head temp sensor and it was clean and corrosion free... is there any other temp sensor on the transaxle that I could look at? Thanks Jay
 
  #2  
Old 06-25-2019, 07:34 PM
Enthusiast
Join Date: Jun 2019
Posts: 2
Default Re: 2009 FEH wrench light P0A7C

Originally Posted by juggie472 View Post
Hello everybody,

I have a 2009 Escape Hybrid with 126k miles. It runs and drives great in town and on short trips. When I get on the interstate and drive 30 minutes/miles or so, the wrench light activates and the P0A7C code is set, its the only code I am getting. I have coolant flow at the bottle and the mecs pump is running(not sure if its weak and dying , flow seems low at the bottle) I took the FEH to ford and had them reprogram the ECM to the latest softwar as per the TSB but it hasn't corrected the issue. We drove an a long cross country trip and it did the SSN once at the 8 hour mark of driving. I shut it off and it restarted and the wrenchlight stayed off until the 30 minute/mile mark again. Kind of stumped as to what to look at next....I did check the head temp sensor and it was clean and corrosion free... is there any other temp sensor on the transaxle that I could look at? Thanks Jay
Hi, did you ever nail down the cause? I just had the exact same thing with my 09 Hybrid that started a couple days ago
 
  #3  
Old 06-26-2019, 01:03 PM
Enthusiast
Join Date: Apr 2019
Posts: 23
Default Re: 2009 FEH wrench light P0A7C

Found this in repairpal if it helps.

OBD II Fault Code

  • OBD II P0A7C
OBD-II Code High voltage system may overheat is defined as a Motor Electronics Over Temperature

The Motor Electronics Coolant Temperature Sensor monitors the temperature of the hybrid coolant system. If the coolant temperature gets too hot, the engine control module (PCM) will set code P0A7C.



High voltage system may overheat Symptoms

  • High voltage system may overheat

Common Problems That Trigger the P0A7C Code

  • Converter failure
  • High voltage control module failure
  • Hybrid transaxle assembly failure
  • Motor electronics coolant temperature sensor failure




Using ForScan, you might be able to run a test or use live data to capture the conditions with and without the wrench.
 
  #4  
Old 06-29-2019, 12:54 PM
Enthusiast
Join Date: Jun 2019
Posts: 2
Default Re: 2009 FEH wrench light P0A7C

I did see that when I googled P0A7C but thanks for posting. Iím leaning toward the electric cooling pump but was just curious if anyone else had the exact same symptoms and what the problem was. It seems from YouTube thatís itís usually the pump but as listed in repair pal it could be be a few other things.
 
Related Topics
Thread
Topic Starter
Forum
Replies
Last Post
jaclins
Ford Escape Hybrid
8
12-15-2015 09:50 PM
c0ugar69
Ford Escape Hybrid
33
03-16-2012 10:07 AM
specelec
Ford Escape Hybrid
0
11-15-2010 10:02 AM
lukemac1
Ford Escape Hybrid
13
04-15-2008 03:23 PM
Hybrid_SUV
Ford Escape Hybrid
5
03-10-2008 12:14 AM


Thread Tools
Search this Thread
Quick Reply: 2009 FEH wrench light P0A7C


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.