virtualbong
Passed Driver's Ed
Hi everyone,
My GTI had a Check Engine light a couple of months back but I resolved it by cleaning the MAF sensor. Unfortunately, the Check Engine light came back and it is much worse now. Before I take it in to a mechanic to diagnose, I would like to try to save myself a lot of money and troubleshoot and resolve on my own. I would love everyone's feedback on whether or not they have experienced this issue before and how you resolved it. Here are some details, pics and video.
Car Details
Year = 2014
Vehicle = VW GTI Driver's Edition 4-Door
Miles = 150,000+
Recent Issue
Back in October of 2019, I received a Check Engine light with an error code stating lean on Bank 1. I bought some MAF cleaner and this did the trick. Note, this was when I had the stock air intake. Since then, I have swapped out the stock air intake for a Unitronic CAI. I had no issues for around 4,000 miles of driving after CAI was installed.
New Issue
Check Engine light came on a couple weeks back and the car started to have a rough idle. I kept driving on it because it seemed to be ok for most of the time, but it has gotten really bad and now the engine lurches and the idle goes from 1,000 RPMs to 2,500 RPMs and back down. It also has stalled recently just driving it into my garage to check out the seals.
I ran an OBD sensor and received the following codes:
P2279
P2187
P0507
Steps Taken So Far
1. I initially cleaned the MAF sensor again, but that did not resolve the issue
2. Purchased a new MAF sensor but the check engine light did not go away and things seemed to get worse
Potential Issues After Research
PCV Valve Malfunction
Two things make me believe this may be the potential culprit.
1. During my install of the Unitronic, I accidentally broke the tab to the connector of the rear breather hose. I zip tied it and it looks secure but that may be where the vacuum leak could be coming from
2. I believe the PCV Valve is broken because it looks to be an oil leak right at the bleed hole (pics below)
After reviewing the summary of my symptoms of a rough idle and my troubleshooting steps, what are people's thoughts on what could be wrong? Do you agree or disagree with my outcome?
I have already purchased a replacement PCV Valve with both breather hoses on Amazon so they should be arriving on Friday. I can return the kit for free if someone believes I am way off and the codes are a result of something else that needs to be resolved. Any help would be appreciated. Thanks VW community!
My GTI had a Check Engine light a couple of months back but I resolved it by cleaning the MAF sensor. Unfortunately, the Check Engine light came back and it is much worse now. Before I take it in to a mechanic to diagnose, I would like to try to save myself a lot of money and troubleshoot and resolve on my own. I would love everyone's feedback on whether or not they have experienced this issue before and how you resolved it. Here are some details, pics and video.
Car Details
Year = 2014
Vehicle = VW GTI Driver's Edition 4-Door
Miles = 150,000+
Recent Issue
Back in October of 2019, I received a Check Engine light with an error code stating lean on Bank 1. I bought some MAF cleaner and this did the trick. Note, this was when I had the stock air intake. Since then, I have swapped out the stock air intake for a Unitronic CAI. I had no issues for around 4,000 miles of driving after CAI was installed.
New Issue
Check Engine light came on a couple weeks back and the car started to have a rough idle. I kept driving on it because it seemed to be ok for most of the time, but it has gotten really bad and now the engine lurches and the idle goes from 1,000 RPMs to 2,500 RPMs and back down. It also has stalled recently just driving it into my garage to check out the seals.
I ran an OBD sensor and received the following codes:
P2279
P2187
P0507
Steps Taken So Far
1. I initially cleaned the MAF sensor again, but that did not resolve the issue
2. Purchased a new MAF sensor but the check engine light did not go away and things seemed to get worse
Potential Issues After Research
PCV Valve Malfunction
Two things make me believe this may be the potential culprit.
1. During my install of the Unitronic, I accidentally broke the tab to the connector of the rear breather hose. I zip tied it and it looks secure but that may be where the vacuum leak could be coming from
2. I believe the PCV Valve is broken because it looks to be an oil leak right at the bleed hole (pics below)
After reviewing the summary of my symptoms of a rough idle and my troubleshooting steps, what are people's thoughts on what could be wrong? Do you agree or disagree with my outcome?
I have already purchased a replacement PCV Valve with both breather hoses on Amazon so they should be arriving on Friday. I can return the kit for free if someone believes I am way off and the codes are a result of something else that needs to be resolved. Any help would be appreciated. Thanks VW community!
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