One morning when I started my passat, the engine started shuddering at idle like it was trying not to choke. When I drove I couldn't really feel anything, but it was very obvious during idle. Then the CEL (Check Engine Light) came on, so I scanned the car with VAG-COM by Ross-Tech and the following fault codes listed below where displayed on the report.
CRANKCASE VENT VALVE (PCV VALVE)
Fault Codes:
Address 01: Engine Labels: 06F-907-115-AXX.lbl
Control Module Part Number: 3C0 907 115 F HW: 3C0 907 115 F
Component and/or Version: 2.0l R4/4V TFSI 0030
Software Coding: 0404010A19070160
Work Shop Code: WSC 05089 444 84564
VCID: 234F829E9B45
9 Faults Found:
008583 - Bank 1; System too Lean at Idle
P2187 - 004 - No Signal/Communication - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100100
Fault Priority: 0
Fault Frequency: 18
Mileage: 84055 km
Time Indication: 0
Date: 2011.09.19
Time: 13:59:26
Freeze Frame:
RPM: 890 /min
Load: 19.6 %
Speed: 0.0 km/h
Temperature: 78.0°C
Temperature: 54.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.589 V
008825 - Leak in Air Intake System
P2279 - 002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 5
Mileage: 84071 km
Time Indication: 0
Date: 2011.09.19
Time: 15:27:57
Freeze Frame:
RPM: 856 /min
Load: 16.1 %
Speed: 0.0 km/h
Temperature: 87.0°C
Temperature: 68.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.208 V
000665 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 002 - Lower Limit Exceeded - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Mileage: 84132 km
Time Indication: 0
Date: 2011.09.20
Time: 12:37:50
Freeze Frame:
RPM: 2826 /min
Load: 78.8 %
Speed: 81.0 km/h
Temperature: 77.0°C
Temperature: 41.0°C
Absolute Pres.: 1010.0 mbar
Voltage: 13.716 V
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 6
Mileage: 84438 km
Time Indication: 0
Date: 2011.09.20
Time: 20:14:22
Freeze Frame:
RPM: 817 /min
Load: 14.5 %
Speed: 0.0 km/h
Temperature: 81.0°C
Temperature: 61.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.589 V
000771 - Cylinder 3: Misfire Detected
P0303 - 002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 6
Mileage: 84438 km
Time Indication: 0
Date: 2011.09.20
Time: 20:15:17
Freeze Frame:
RPM: 841 /min
Load: 14.9 %
Speed: 0.0 km/h
Temperature: 82.0°C
Temperature: 63.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.335 V
000772 - Cylinder 4: Misfire Detected
P0304 - 002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 6
Mileage: 84438 km
Time Indication: 0
Date: 2011.09.20
Time: 20:15:17
Freeze Frame:
RPM: 841 /min
Load: 14.9 %
Speed: 0.0 km/h
Temperature: 82.0°C
Temperature: 63.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.335 V
000770 - Cylinder 2: Misfire Detected
P0302 - 002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 5
Mileage: 84438 km
Time Indication: 0
Date: 2011.09.20
Time: 20:15:17
Freeze Frame:
RPM: 841 /min
Load: 14.9 %
Speed: 0.0 km/h
Temperature: 82.0°C
Temperature: 63.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.335 V
000769 - Cylinder 1: Misfire Detected
P0301 - 008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 2
Mileage: 84517 km
Time Indication: 0
Date: 2011.09.20
Time: 23:16:07
Freeze Frame:
RPM: 1779 /min
Load: 31.4 %
Speed: 34.0 km/h
Temperature: 84.0°C
Temperature: 57.0°C
Absolute Pres.: 1010.0 mbar
Voltage: 13.716 V
So after doing a lot of research, I found out that the Crankcase Vent Valve might be the cause of all these faults, and due to the leak in the intake, the cylinders are misfiring. One way to check if the Crankcase vent valve is faulty, is to start the engine and try to remove the engine Oil cap, and due to the very high suction, it is literally very hard to remove it. And that was the case with my car, I'm not saying its impossible to remove the oil cap while the engine is running, but you have to really pull on it to remove it compared to the normal situation where it comes off easy. Below are pictures and DIY steps for replacing the Crankcase vent valve.
STEP 1
Remove the plasic Silver Engine cover and locate the Crankcase Vent Valve to the right of the engine oil cap.
STEP 2
Remove the 2 hoses that attach to the Crankcase Vent Valve by carefully pressing on the lock rings that fasten them and pulling them back.
STEP 3
Unscrew the 4 screws that attach the Crankcase Vent Valve to the enginge.
STEP 4
This is the Crankcase Vent Valve Gasket. Pay special attention to the little tail at the bottom of the right ring. This is there for a reason, so the gasket is not installed upside down. This Gasket costs about $45 and the next question is "Does it need to be replaced?". Well, it is always best to replace with a new one, but in this case, you don't need to replace it if it is not damaged.
STEP 5
If you decide on replacing the old Crankcase Vent Valve Gasket, then make sure you clean the grooves that it fits in with a cloth and thin screwdriver from any scum or residue.
STEP 6
When installing the new Crankcase Vent Valve Gasket, pay special attention to the tail on the bottom of the right ring, and snuggly fit the gasket into the groove.
STEP 7
After carefully checking that the gasket is in place, attach the new Crankcase Vent Valve and fasten it with the 4 screws. Be very careful when tightening the screws, so you don't over tighten and damage the Crankcase Vent Valve. It is a plastic part and can crack. Then attach the the inner hose first and make sure it locks into position.
STEP 8
Attach the second hose and also make sure it locks into position. Then do a final check to make sure everything is connected properly and attach the silver engine cover.
STEP 9
Now reset the fault codes using VAG-COM and start the engine. Even if you start the engine before reseting the fault codes, you will definitely feel a big change in engine performance immediately. The CEL will not turn off by itself, so you will definitely need to use VAG-COM to turn it off.
Where did you purchase your Pressure Control Valve?
ReplyDeleteI purchased it from the local VW Dealer. You can also get an OEM part online. The CRANKCASE VENT VALVE link above the first figure links you to PartsGeek online store.
DeleteI've heard that this part had a warranty extension letter sent out about it. Audi/VW screwed up my contact info when I bought and I've never gotten anything from them. My vent valve is shot (or so they say; brought it in with a horrible squeaking like a tensioner was out) and they want $400 to replace it (hopefully that counts the two days they've had it trying to figure out what was squeeking).
ReplyDeleteVW did send out a recall notice on the PVC valve. The dealer should replace it for free if it is faulty. Find out what they are charging you $400 on, and you may need to contact VW of America if there are any service issues with the dealer.
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ReplyDeleteGood Morning, My 2006 Passat 2.6 was just diagnosed with this same problem. The repair shop did a diagnostic test and told me the following...
ReplyDeleteConducted smoke/pressure test of the intake and crankcase vent systems. Found leak through crankcase vent valve.
On this model, crankcase vent valve is an integral part of the valve cover assembly.
estimate to repair is $975.00
Should this cost $975 to repair? I'm told the part alone is $370 and that it will require them a day to complete the job. Could my repair be different from the one you described in your photos? I pretty much have the same fault codes you reported and also the idle is horrible when you stop at a traffic light or are just starting the car. No issues when you're driving the vehicle.
This is an easy fix in my opinon, you can buy original part online a lot cheaper. Use the link in the first sentence under Step 1. It took me 35 min. Part was no where near your quoted price. Good luck, let me know how it goes.
ReplyDelete