New battery causing new fault codes?

JON F

MEMBER
2001 FORD TAURUS
3.0L
V6
150,000 MILES

I recently replaced the battery on my car listed above with a slightly larger one (720cca vs own 650cca) and several new codes appeared when I started it. The check eng light came on as well as the ABS and my new codes are P0750, p0743, p0760, p1451, p01747, p0135. Did I screw something up? I left an important piece of info; I crossed the jumper cables before I replaced the battery. I did start it with the old battery a couple of times after that and no codes appeared, but I'm not sure if crossing polarity damage can be a delayed process or not. All fuses are okay.

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

It looks like you've provided a list of trouble codes for your 2001 Ford Taurus.

P0750 - Shift Solenoid 'A' Malfunction:

P0743 - Torque Converter Clutch Circuit Electrical:

P0760 - Shift Solenoid 'C' Malfunction:

P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction:

P1747 - Electronic Pressure Control Solenoid 'A' Short Circuit:

P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1):

So, I would clear the codes and see if they come back. It could be a glitch due to connecting the battery. If they do come back please start a new thread for each code.

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Saturday, September 2nd, 2023 AT 6:22 PM

JON F

MEMBER
3 POSTS

Thank you very much Sir for taking the time to respond! Your explanation of these fault codes in layman's terms is more than I was expecting!
I retired recently after 47 years in the collision repair industry. Most of those years were spent building hard hits which usually require some sort of frame/suspension repair/replacement, but anything more than replacing a crushed pig-tail, splicing a cut wire, or checking for blown fuses, my electrical and diagnostic skills are very limited, to say the least.
I cleared the codes and unfortunately, they came back. As I stated in my original post, none of these codes appeared before my battery mishap.
So, I guess my question to you is, which code should I address first?
The car probably isn't worth the money I'm sinking into it. I recently replaced all 4 struts, tie rods, control arm bushings, brakes and rotors, plugs, wires, fuel pump, all the fluids, and 4 new tires. Oh, and that $150.00 battery. The thing has good compression, been we'll maintain since I bought it in 08 and all of all, it has been a very reliable ride up until now.
Once again, I want to thank you for your help!

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Sunday, September 3rd, 2023 AT 6:50 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

If all of these codes came up at once after the battery replacement, I would say the voltage surge took out the PCM, you can get a preprogrammed unit by searching Google or Ebay. Here is a guide to help walk you through the repair and I have included instructions in the images below for your car:

Check out the images (below). Please let us know what happens.

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