Hi all, new here. Quick question.

I ran a scan tool on the car, 2002 honda Accord EX V6. Says P1607 ECM bad.

The car runs rough for 5 minutes at start, something which no computer controlled car should do. Hunts for idle, varies by 500 rpm. But the weird thing I need help addressing is the transmission and an understanding if the ECM can be the culprit.

The car will go in reverse beautifully. Drop into D4, will roll 1 ft forward switch into reverse. Drop into D3, will roll forward drop into reverse, positions 2 and 1 the car goes forward without slipping into reverse and I can then shift into D3 and D4 without it going into reverse.

QUESTION does the ECM control these solenoids? I did not see any shifter linkage. So, I m thinking it is a computer problem. Any help at all?

 

PCM has an internal fault.

You may verify by using a known good donor PCM. You will need the key and PCM from the donor car. Cut a non transponder key for your car. Tape the donor key to the non transponder key. Disconnect the battery and replace your PCM with the donor PCM. Reconnect battery and start your car with the donor key taped to the non trasnponder key. If the car runs fine with no codes then most likely your PCM is faulty and will need to be replaced.

PCM controls shift solenoids. Shifter cable enters the transmission from the bottom near the bellhousing, you should see a large black line.
If the PCM is faulty the engine will run rough, if the engine is running erratically then the transmission will also shift erratically. Transmission shift quality is greatly affected by the running condition and sensors of the engine. If the PCM is faulty it will affect all aspects of the vehicles operation.