Has anyone seen this code? Thanks

 

Year and engine model would help

 

2015 3.5 XLT 4" to 8" MFT upgrade, added remote start, added downhill assist, added subwoofer. 37,000 miles. All of the above has been that way for a month. The code popped up this morning, hooked it to Forscan, but my laptop died right in the middle of it.

 

My service manual for a 16 says:

P166A - Restraints Deployment Communication Circuit
"DTC sets when the PCM detects an open or short in the IES circuit"

 

No SSMs or TSBs

 

That's what forscan said this morning. I got back in it and drove ato lunch and then again on the way home and no MIL. Weird.

 

Weird. Communication codes are usually a U code, not P. Could be a moisture or condensation issue in one of the connections or bulk heads. Wouldn't worry about it until it comes back.

 

It did rain like a sumanabitch this weekend, and I didn't drive it.

 

I purchased a 2016 F-150 XLT Sport a few weeks ago and had some issues this past week with the wrench icon coming. The truck also stalled on me while sitting at a light this week - the battery light came on in addition to the wrench.

The dealership found the P166A code today and this is the description on the work order:

Retrieved code P1661
Restraint Deployment Communication Circuit
EEC pinpoint test (circuit test KC) followed guided BCM routine and reconfigured BCM. No faults found.

So far it hasn't come back on - hope that helps!