Code P0018

Tiny
DARRINELECTRIC
  • MEMBER
  • 2009 GMC ACADIA
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Code came up. Had all four replaced in December 2017. Could the sensors gone bad already?
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Tuesday, August 21st, 2018 AT 4:03 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,635 POSTS
Hi and thanks for using 2CarPros.com.

I hate to say it, but yes. The code you have indicates one of the sensors has failed. Here is the description of the code:

DTC P0018
- Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 2

Now, there are other things that can cause this code. A worn timing chain, a crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft, timing chain tensioner condition issue, or something as simple as a bad connection at the sensor.

If you want to check the connection to this sensor or try to replace it, here are the directions. The first 6 pictures correlate with these directions. Check the wiring at the connection first. The last picture is of the crankshaft position sensor. I added it because these two work together. However, if the crank sensor was causing a problem, I feel the other cam sensors would be setting codes too. Regardless, if you want to check the connection and wiring, I attached the pic of its location.

Here is a link that shows how to check wiring.

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

__________________________________________

Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake

Removal Procedure
1. Remove the engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Side (See: Engine Mount > Removal and Replacement).
2. Remove the radiator inlet hose from the water outlet. Refer to Radiator Inlet Hose Replacement (See: Radiator Hose > Removal and Replacement).
3. Remove the power steering fluid reservoir bracket bolts (1).
4. Remove and reposition the power steering fluid reservoir bracket (2) out of the way.
5. Disconnect the engine wiring harness electrical connector (8) from the bank 2 intake camshaft position (CMP) sensor (7).
6. Remove the CMP sensor bolt and sensor (3).

Installation Procedure
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).

1. Install the CMP sensor (3) and bolt.

Tighten the bolt to 10 Nm (89 lb in).
2. Connect the engine wiring harness electrical connector (8) to the bank 2 intake CMP sensor (7).
3. Position and install the power steering fluid reservoir bracket (2).
4. Install the power steering fluid reservoir bracket bolts (1).

Tighten the bolts to 9 Nm (8 lb in).

5. Install the radiator inlet hose to the water outlet. Refer to Radiator Inlet Hose Replacement (See: Radiator Hose > Removal and Replacement).
6. Install the engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Side (See: Engine Mount > Removal and Replacement).
____________________________________________________

I hope this is helpful. Let me know if you have other questions or need help with anything.

Take care,
Joe
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Wednesday, August 22nd, 2018 AT 7:08 PM
Tiny
DARRINELECTRIC
  • MEMBER
  • 2 POSTS
Thank you
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Thursday, August 23rd, 2018 AT 5:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,635 POSTS
No problem. I just hope I helped. Let me know if you have other questions.

Take care,
Joe
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Thursday, August 23rd, 2018 AT 8:35 PM

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