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Codes P0171, P0102, P0113, P0340

Tiny
07WHITECOROLLA
  • MEMBER
  • 2007 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 183,000 MILES
Hello, my car has four fault codes and I am trying to remove them. I bought the camshaft position sensor for the P0340 code and I will be installing that this Thursday when it arrives. The other three codes have been an ongoing problem and is becoming very frustrating. I have done several tests on the MAF wiring according to various sites online and it has come back with good results. I also replaced the MAF with an OEM Denso brand with no results. Is there a wiring diagram that I can look at or something because there has to be an issue with the wires since these codes will not go away? I started to peel back the the tape and the wires just seem to be never ending and it would really help if I knew where the ground was instead of trying to peel back all of the tape. I have had the car smoke tested for a vacuum leak as well and it does not have any. Spark plugs were recently replaced as well as the intake and valve cover gasket. Help!
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Tuesday, April 24th, 2018 AT 11:08 PM

12 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
Hello,

The system too lean problem can be caused by a weak fuel pump. here is a guide to help you get an idea of how to test the fuel pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here is a guide to help you check the engine wiring diagrams below:

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

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Thursday, April 26th, 2018 AT 5:02 PM
Tiny
07WHITECOROLLA
  • MEMBER
  • 8 POSTS
Just replaced fuel pump and pressure is good. Did not fix my issue. I checked compression too and it was great.
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Thursday, April 26th, 2018 AT 6:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
The fact that the camshaft position sensor code will not go away is telling me the camshaft must be in the worn time like a camshaft actuator is not working or worn out. I have seen where people change there oil and the actuator starts working again while other times it must be replaced at 183,000 miles this is big possibility. Below are diagrams to help you see what you are in for when doing the job. You should also install a new timing chain.

Below are diagrams to show you what you are in for when doing the job.

Check out the diagrams (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Friday, April 27th, 2018 AT 8:53 AM
Tiny
07WHITECOROLLA
  • MEMBER
  • 8 POSTS
I am replacing the camshaft position sensor today to see if that code goes away but my real problem is the P0171, P0113, and P0102. That is why I wanted to see where the ground is for the MAF sensor so I can check the connection as well as the other four wires too.
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Friday, April 27th, 2018 AT 10:20 AM
Tiny
07WHITECOROLLA
  • MEMBER
  • 8 POSTS
I installed a new ECT, and camshaft position sensor. I unwrapped the tape for the MAF wiring and sprayed parts cleaner on the grounds and the codes went away. The only code is the P0171 still and I cannot remove it. I took the PCV valve off and put my hand on it and it is sucking so it is working properly.
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Friday, April 27th, 2018 AT 7:59 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
We are getting closer. Do you have any exhaust leaks? Because that will make the system run lean. Here is a guide to help us with this problem:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Please run this test and get back to us.

Cheers, Ken
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Saturday, April 28th, 2018 AT 9:00 AM
Tiny
07WHITECOROLLA
  • MEMBER
  • 8 POSTS
No exhaust leaks, because the smoke test would have found it. I am thinking about replacing my vacuum purge valve switch and see what it does and then fuel injectors if I do not see a change.
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Saturday, April 28th, 2018 AT 9:52 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
I have seen clogged injectors cause a lean code. If you replace them use the OEM or you will regret it. Sometimes they work sometimes they do not.
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Saturday, April 28th, 2018 AT 4:18 PM
Tiny
07WHITECOROLLA
  • MEMBER
  • 8 POSTS
Okay, I ordered four Denso injectors which should be here by Friday. I will keep you posted. Thanks.
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Sunday, April 29th, 2018 AT 3:57 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
Please let me know. :)
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Monday, April 30th, 2018 AT 11:12 AM
Tiny
JROCK14
  • MEMBER
  • 19 POSTS
Code gone and everything is works great! My fuel injectors had to of all been clogged or dirty.
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Wednesday, May 2nd, 2018 AT 8:20 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,240 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.

Cheers, Ken
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Thursday, May 3rd, 2018 AT 9:58 AM

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