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Installed wires on coil pack incorrectly

Tiny
NYNE
  • MEMBER
  • 2010 NISSAN ALTIMA
  • 740,000 MILES
Put wires wrong on coil pack, I think mess up the computer diagnostics. It says the ECU/ECM bad. I got a 2008 ECU/ECM. What to do from there or what exactly you think the problem is?
Saturday, January 29th, 2022 AT 2:28 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,164 POSTS
Hi,

Hooking the wires up on the coil packs backward, shouldn't cause PCM failure. What codes are you getting that indicate the PCM is bad?

Here is a guide that may help with pulling codes if you or others need it.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If you have codes that say there is an internal failure then the only real option is to replace the ECM. However, let's start with what codes they are and then we can figure out possible solutions.

Also, let me know what was happening that led to the issue.

Take care,

Joe
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Saturday, January 29th, 2022 AT 4:04 PM

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