Engine swap

Hi and thanks for using 2CarPros.

You have me a bit confused. Is there a transmission or engine problem? If you need to replace the engine, everything on the car is designed for the one in it. In other words, everything needs changed if you decide to use a different engine other than the same year make and model engine you presently have, which I don't suggest.

Explain what is happening so I can better understand if the problem is transmission or engine related. Also, tell me what is happening. I may be able to give you some suggestions to remedy the problem.

I will watch for your reply.

Take care,
Joe

Reading the symptoms you posted, was the replacement transmission a new one? Rebuild or used? The codes both point to control circuit malfunctions like a pinched or damaged wire, very easy for that to happen when reinstalling a transmission and you don't watch carefully.
As for doing a swap, as Joe says, there isn't really anything you can do except install the same engine and transmission types that you have. However, for the codes you have I don't think that would help as it sounds like there is an issue in the wiring.

Next, I would find a different shop that works on Honda's. It sounds like the current one doesn't really care to solve the problem.

Welcome back:

I agree with Steve. I have a feeling a wire was damaged or pinched when the work was done. Let us know what you find out.

Take care,
Joe

Welcome back:

Since there is no evidence of a damaged wire, then further testing is required. I realize you are tired of checking it but thought I would add this in case you want to try it.

___________________________________________

P1676
DTC P1676: Frame to Powertrain Torque Down Request (FPTDR) Signal Line Failure.

1. Reset the PCM.
2. Start the engine and wait 10 seconds.

Is DTC P1676 indicated?

YES - Go to step 3.

NO - Intermittent failure system is OK at this time. Check for poor connections or loose wires at the ABS/TCS control unit and the PCM.

3. Turn the ignition switch OFF.
4. Disconnect the negative cable from the battery.
5. Disconnect PCM connector E (20P) and the ABS/TCS control unit 16P connector.

See Picture 1
6. Check for continuity between the body ground and PCM connector terminal E16.

Is there continuity?

YES - Repair short in the wire between the ABS/TCS control unit and the PCM (E16).

NO - Go to step 7.

See Picture 2
7. Check for continuity between the ABS/TCS control unit 16P connector terminal No.1 and PCM connector terminal E16.

Is there continuity?

YES - Go to step 8.

NO - Repair open in the wire between the ABS/TCS control unit and the PCM (E16).

8. Reconnect PCM connector E (20P).
9. Reconnect the negative cable to the battery.

See Picture 3

10. Connect PCM connector terminals E16 and C28 with a jumper wire.
11. Reset the PCM.
12. Start the engine and wait 60 seconds.

Is DTC P1678 indicated?

YES - Substitute a known-good ABS/TCS control unit and recheck. If the symptom/indication goes away, replace the original ABS/TCS control unit.

NO - Substitute a known-good PCM and recheck. If the symptom/indication goes away, replace the original PCM.

__________________________________________

Here are a few links you may find helpful for testing:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

If you decide to try this, let me know if I can help.

Take care,
Joe