Code P0520-00, where is the engine oil pressure sensor and wire located?

Tiny
FUHRUNG
  • MEMBER
  • 2006 PONTIAC G6
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Hi, I bought this car at auction for my teenage son. It is throwing a P0520-00 EOP switch circuit code. I did notice there was a single white with black stripe wire coming from a sensor under the front exhaust manifold that got cut coming up into the engine compartment. I can't find the other end where it connected to in the wire loom. I don't have any spark so I'm wondering if this could be the reason why. I also had a crankshaft position sensor that was out, and when I pulled the old one out it had decent mechanical damage on the end of the sensor, replaced with new.
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Monday, September 12th, 2022 AT 2:23 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The oil pressure switch is near the rear of the engine above the starter motor. (See pic 1) for location. As far as wiring, it will only have one that is tan with a black tracer. (See pic 2) Could the one you see be tan and not white?

As far as a white wire with a black tracer, I went through the entire powertrain management circuit schematics. I found one wire that color. It runs from the throttle actuator control module to the accelerator pedal position sensor (APP). See pics 3 and 4

As far as the crankshaft positions sensor being damaged, that is a concern. Could you upload a pic of it so I can see what happened?

Also, have you checked to see if any diagnostic trouble codes have set?

Let me know.

Joe

See pics below.
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Monday, September 12th, 2022 AT 7:39 PM
Tiny
FUHRUNG
  • MEMBER
The wire is very likely tan with black tracer as I thought it could have been faded yellow too. Here is pic of CKP. The only DTC now is the one previously listed.
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Monday, September 12th, 2022 AT 7:52 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Wow. Something was hitting the sensor. Do you hear any noise from the engine when cranking that could indicate the new sensor is being damaged?

Let me know.

Joe
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Monday, September 12th, 2022 AT 9:10 PM
Tiny
FUHRUNG
  • MEMBER
Yep, that's what I thought. However, the engine was swapped with a good used in the last 10,000 miles so possibly even they swapped that sensor too, as no, I don't hear any abnormal sounds while engine is cranking. Where does the tan/blk EOP wire go to?
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Tuesday, September 13th, 2022 AT 5:12 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The EOP switch wire goes from the switch to the powertrain control module, connector 2 pin 57. I attached a pic below for you to reference.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pic below.
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Tuesday, September 13th, 2022 AT 1:00 PM
Tiny
FUHRUNG
  • MEMBER
Awesome thanks so much you guys' rock. I was able to trace it back from the connector, found it cut in the wire loom, and re-connected. I then cleared all the DTC's and attempted to start. It still only cranks and never fires off. I gave it a snort of starter fluid a couple times but it only fires for about half a second. It's now showing these two codes, pic attached. Note that when I bought the car there was no key included so I had to take the title to a local GM dealer so that they could make me a key. I went through the programming procedure for the new key and it accepted it.
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Tuesday, September 13th, 2022 AT 5:44 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The starting fluid and codes confirm it isn't getting fuel. You indicated there was a new key and it was programmed and recognized. Is the antitheft light staying on solid or flashing? If it is, I want you to try this. Turn the key to the run position and allow it to sit for approximately ten minutes. If the light turns off, see if it will start.

As far as the codes are concerned, P1625 is specific to the theft deterrent signal. Here is how it works. The theft deterrent module (TDM) produces the theft deterrent fuel enable password when the ignition is "on" and the proper transponder key value is detected. The powertrain control module (PCM) monitors the fuel enable password. If the proper signal is present on the serial data circuit, the PCM enables the fuel delivery in order to allow the engine to start. If the signal isn't recognized or received, it shuts down fuel.

As far as diagnosing this code (P1626), I attached the diagnostics below. (Pics 1-4) However, since you have had things replaced and programmed, I don't feel this is the issue. I believe it is a short on the GMLAN serial data circuit preventing the control module operation.

First, try the key on test. If that does nothing, go through the diagnostics below in pics 1 to 4. If that doesn't help, we need to check the GMLAN and the serial data wiring between the body control module and the powertrain control module. There are two wires in particular to check. One is tan and the other is tan with a black tracer. Confirm there is a good connection at the BCM logic module, no corrosion, and no damage to the wiring. Also, we need to check the dark green wires between the anti-theft module and the logic module. See the last pic below

Let me know if that helps or what you find.

Take care,

Joe

See pics below.
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Tuesday, September 13th, 2022 AT 8:34 PM

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