1998 Accord P1607 Alongside other sensor high voltage codes

[95Tech]

Checked for Error Codes and this is what I got:

P0108 Manifold Absolute Pressure sensor circuit high voltage
P0113 Intake Air Temperature (IAT) sensor circuit high voltage
P0118 Engine Coolant Temperature (ECT)sensor circuit high voltage
P0123 Throttle Position Sensor (TPS) circuit high input.
P1498 Exhaust Gas Recirculation (EGR) valve sensor circuit High voltage.
P1607 Internal ECU Malfunction.

When I erase these codes only three WILL NOT GO AWAY!!!!!(IAT, ECT, & P1607)
The rest come as soon as I start the car. It backfires and smokes but run. New Map Sensor and the Code still pops up. How can I fix this?

Anybody knows what this means???

 

[CDsDontBurn]

Well, P1607 is for ECU / PCM. You will likely have to replace it. But do some troubleshooting first. The Drive Accord link below has some steps for you to troubleshoot by removing a few fuses and whatnot.

https://www.driveaccord.net/forums/...p1607-cel-after-cold-night-car-limp-mode.html

https://www.google.com/search?rlz=1...813...0i67k1j35i39k1j0i20i264k1.0.e0CDuXFQD_4

I had P0118 last week. Ended up replacing the sensor and everything is good now.

 

[95Tech]

Yes. It started with just that one MAP code then after I drove to Dallas Texas from Memphis it started these symptoms of not starting and these trouble Codes. I called Honda today and the service mechanic said that it could be the ECU or another electrical circuitry malfunction and their electrical diagnosis’s start at $199 dollars. .

 

[95Tech]

I might have to replace the ECU with a used one and get it programmed at HONDA/Acura of Memphis. I’ll keep you all updated

 

[CDsDontBurn]

I would start with that. Pull an ECU from an Accord at your local junk yard and take it to your Honda / Acura stealership to have re-programmed for your car.

 

[95Tech]

Ok swapped the ECU initially installing one from U-Pull it, it erased the code P1607 but wouldn’t start the Car. So all intermittent codes were not showing up on my OBD2 scanner, changed the immobilizer chip out the donor ECU car cranks but still has the P1607 code.

 

[CDsDontBurn]

Did you take the donor ECU to a stealership to have it programmed to your car?

 

[selttijcmanit]

That many high voltages is probably a bad 5v rail on the ECU

 

[95Tech]

Update::!!! the scrap yard ECU runs better but take off is slow. Still only one P1607 code. Any help would be appreciated on what causing my slow take off. ALSO:The car had a jumper wire leading from the fuel pump when I purchased it about a year ago. It sat up until this past March when I was forced to drive it because my 97 thunderbird quit on me and needed fixing. Upon visual inspection, I saw the Black & Yellow wire being severed in the pig tail of the fuel pump. Ran a wire to connect the two ends and left the initial wire that ran to the fuse box off to see would it power the fuel pump with its stock pig tail power. It did. But car runs extremely slow this way...

 

[95Tech]

No. I took the immobilizer chip out the donor ECU. Green key flashes but it cranks and Starts.