Weird transmission and engine issues, any help?

[somebeach]

So recently I bought an Aurora and it was working well, until one day it shifted very hard and tached out. I read the OBD, and it said that my crankshaft position sensor was bad.  No biggie, I replaced it and had no more issues for a good amount of time.  


Then one day, while driving it became stuck in one gear, and after turning off the engine, wouldn't turn over. 

Here's where it gets weird, because it gave me 5 OBD codes all of which seem almost totally unrelated. Here's what I got.


P1860: TCC PWM Solenoid Circuit - electrical
P0340: Camshaft Position Sensor Circuit
P0385: Crankshaft Position Sensor B Circuit
P0753: 1-2 Solenoid Valve Control Circuit
P0122: Throttle Position Sensor 1 Circuit Low Voltage


So I'm left with many seemingly unrelated codes? I can't find a wiring diagram online to see if they're all on one fuse or something. Any help?

[Paulaurora]

did you try to clear the codes? What Diagram you need ?

[somebeach]

Yeah I cleared the code each time. As for which wiring diagram I'd need, I'm not entirely sure to be honest.

[Marc]

What year's Aurora?

[somebeach]

'01

[Paulaurora]

4.0 or 3.5?

[Marc]

Being stuck in one gear night indicate a bad vehicle speed sensor.

[gui]

Mine did something similar. Same car, '01, 4.0. TCC code, crankshaft sensor code, MAF code (replaced), outboard speed sensor (replaced). I fixed the speed sensor and windshield washer hose one night and left the hood up because I didn't see a light to drain the battery. The next morning the battery was dead. So I charged it up and took off to test the speed sensor. Another day shortly thereafter I went to leave and it wouldn't start. Just sat there clicking real fast. Dead battery. I charged it fully and had it tested at Autozone and O'Reilly and it tested good at both places. So since then I bought the internal speed sensor because the speedo was still acting up a little, and crankshaft sensors, the oil pan and lower block gaskets and when it warms up I'm going to pull the engine & trans and change those parts too. When it was running it ran like brand new, shifted like brand new and I hate to take it out but that oil leak is pretty bad.

There's a guy in Lansing (MI) that has a video on YT about this engine and he told one of the people commenting that it would be around $2,500 to do the gaskets. I didn't pay much more than that for the car, I can't afford that bill too so I'm going to do it myself. Fortunately I've done a lot of this type of work over the last 45 years so I'm not worried about screwing it up. I'm just hoping my body holds up!!! lol

[Marc]

Mar 21, 2023 16:15:52 GMT -6 gui said:

Mine did something similar. Same car, '01, 4.0. TCC code, crankshaft sensor code, MAF code (replaced), outboard speed sensor (replaced). I fixed the speed sensor and windshield washer hose one night and left the hood up because I didn't see a light to drain the battery. The next morning the battery was dead. So I charged it up and took off to test the speed sensor. Another day shortly thereafter I went to leave and it wouldn't start. Just sat there clicking real fast. Dead battery. I charged it fully and had it tested at Autozone and O'Reilly and it tested good at both places. So since then I bought the internal speed sensor because the speedo was still acting up a little, and crankshaft sensors, the oil pan and lower block gaskets and when it warms up I'm going to pull the engine & trans and change those parts too. When it was running it ran like brand new, shifted like brand new and I hate to take it out but that oil leak is pretty bad.

There's a guy in Lansing (MI) that has a video on YT about this engine and he told one of the people commenting that it would be around $2,500 to do the gaskets. I didn't pay much more than that for the car, I can't afford that bill too so I'm going to do it myself. Fortunately I've done a lot of this type of work over the last 45 years so I'm not worried about screwing it up. I'm just hoping my body holds up!!! lol

I hope you get it done!!!!

[gui]

I will, it will just take me a while. I turned 60 this year and am still recovering from my 5th aneurysm repair in my lower body. I can't do any heavy lifting but I have the equipment and my brother has a cherry picker. If I need some muscle I can call my nephew. I figured out several years ago how to work smarter, not harder out of necessity. It's a b**** getting older! lol

[Marc]

Mar 21, 2023 20:01:31 GMT -6 gui said:

It's a b**** getting older! lol

I know! I'm going to be 80 later on this year, but I'm still going to do what I can on my 2001!!!

[gui]

Mar 18, 2023 20:31:19 GMT -6 somebeach said:

P1860: TCC PWM Solenoid Circuit - electrical
P0340: Camshaft Position Sensor Circuit
P0385: Crankshaft Position Sensor B Circuit
P0753: 1-2 Solenoid Valve Control Circuit
P0122: Throttle Position Sensor 1 Circuit Low Voltage


So I'm left with many seemingly unrelated codes? I can't find a wiring diagram online to see if they're all on one fuse or something. Any help?

The sensors you listed won't be fused. They are controlled by the computers and the computers are fused. Two of those are transmission solenoids, three are engine controls. To have all of those pop up out of nowhere is unusual. The hard shift and "tached out" are symptoms like I had when my speed sensor went bad. I haven't replaced my crank sensors yet, there are two on the 4.0 which mine is. I don't know what the 3.5 has. I'm wondering if you have a bad harness connection or ground problem, it seems those are somewhat common on these cars too. 

Regardless, if you search online you can find some of the information you're looking for but for this car it will take some looking. I haven't found everything I need yet and I don't want to spend a hundred bucks or so for the three-book service manuals. 

[crocodileguy]

Mar 18, 2023 20:31:19 GMT -6 somebeach said:

So recently I bought an Aurora and it was working well, until one day it shifted very hard and tached out. I read the OBD, and it said that my crankshaft position sensor was bad.  No biggie, I replaced it and had no more issues for a good amount of time.  


Then one day, while driving it became stuck in one gear, and after turning off the engine, wouldn't turn over. 

Here's where it gets weird, because it gave me 5 OBD codes all of which seem almost totally unrelated. Here's what I got.


P1860: TCC PWM Solenoid Circuit - electrical
P0340: Camshaft Position Sensor Circuit
P0385: Crankshaft Position Sensor B Circuit
P0753: 1-2 Solenoid Valve Control Circuit
P0122: Throttle Position Sensor 1 Circuit Low Voltage


So I'm left with many seemingly unrelated codes? I can't find a wiring diagram online to see if they're all on one fuse or something. Any help?

Did you ever get it fixed? I've recently had similar issues with intermittent hard shifts, and it's an electrical harness/grounding related. Oldsmobile TSB 09-06-03-004D might have useful info for you in a THOROUGH cleaning of the relevant body grounds doesn't help.

On the DIC, go to GAGE and tell us -- how's your voltage? Is it pretty constant or does it fluctuate all over the place, especially at idle?

[Paulaurora]

3.5 common issue with hard shifts most of the time the pressure sensor need to be changed but sometimes full rebuild . I had this on my 3.5 intrigue and 3.5 aurora in one of them. intrigue was so random maybe once in 3-4 month all i had to do is stop turn car off wait like 10 sek turn back on and hard shift is gone. so i just drove it till 215k miles than i decided to get another car since it needed engine rebuild and trans.