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HELP! No communication with ecu

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Old Sep 16, 2025 | 07:18 AM
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Spoonmoon
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From: Estero Florida
Default HELP! No communication with ecu

Hello people. I’ve finally come to the forums as I’m officially stumped. I have a 2003 350z. Ran 3 years ago before swapping in a new engine and messing with ignition at the time. I lost communication with the Ecu. Fuel pump primes. There’s power and everything. But I’m receiving code P1065 and still getting no communication. I’ve slowly picked at it over the years. I’m on my 4th ECU (Nats deleted of course). I’ve replaced harnesses. Ignition, IPDM, BCM, ect ect. Still absolutely nothing. Yes your all going to say just do a standalone at this point but the car has a crazy history and I’ve been able to keep the whole build under $3k (including it being widebodied, Single turbo etc) so to go with the theme of being broke I’m trying to keep it as budget friendly as possible. Definitely considering wiring up a Speeduino at this point as it is cheaper. But if anyone can help with info on stripping the harness and removing all canbus modules completely that would be incredible. I don’t care about Abs, tcs, windows, ac, **** even the gauges I can workout down the road if need be. I just can’t stand to see my baby sitting anymore and I’m truly stumped with this Canbus bs. If there’s anyone that even thinks they can help a little please message me. I’ve tried what seems like everything. I’m open to cutting all corners. I’m not worried about anything in the body what so ever. I only care about getting it running. Thank you and have a blessed day.
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