Hey all. I have a 2000 V70 with 128K miles on it. Seems to run fine, decent smooth power, sounds and feels okay under acceleration. My son drives it. The other day CEL came on and it had thrown codes ECM-3310 through ECM-3350, plus code ECM-3200 (6 codes). Those codes report ignition coil faulty signal. If I clear them they all come back, pretty much immediately. The thing that gets me is it's ALL the coils all at once. I replaced all the coils a few years back, as it was throwing some codes back then (don't remember which code - but pointed to coils), and since then no more coil codes. For this new problem I have inspected the wiring harnesses to the coils, and coil plugs. Wiring and connectors all appear healthy and clean. I also checked the engine +12V relay, and it seems to be delivering full battery voltage while engine is running. I'm thinking some ECU pins corrosion problem?? Or what?
I have purchased the ECU removal tool, it's on it's way, so I can remove and inspect the ECU pins/connectors. Any other ideas appreciated?

 

Soooo, I took a somewhat shotgun approach and replaced all the coils and plugs. I decided to buy Bosch coils, and Volvo plugs. I've learned over the years, especially with GM vehicles that aftermarket parts can be real junk. The coils that are in this V70 are some off name, probably chinese parts. I also wrapped the entire coil wiring harness with high temp loom tape I bought on Amazon [BTW this loom tape is really good stuff - been using it for a while now - an it's surprisingly inexpensive]. Anyway, those steps worked. I cleared the codes and none of them have returned - been a week now.

Link to the loom tape:

Tesa's Most Advanced High Heat Harness Tape 51036

https://www.amazon.com/dp/B01I2MLN2Q

Cheers!

 

I got no codes for individual coils, just the code ecm-3200. Any ideas?

 

I got no codes for individual coils, just the code ecm-3200. Any ideas?