Picked up a 2005 Jetta a month ago, it ran prefect when I got it but last week started to Idle very rough but it runs fine once you are rolling (anything over 1500 rpm) I pulled the codes and have a p0016 and p0301-p0305
while the code points to timing chain I see other options that can cause this. (crank sensor cam sensor pcv system vac pump n205 sensor....) can anyone give a good order of attack and steps to narrow down and eliminate this issue.
Thanks in advance for the help!
Rick

 

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VAG Error Code: 16400/4096/000022
EOBD II Error Code: P0016

Fault Location:
Camshaft Position (Hall) Sensor (G40)/Engine Speed Sensor (G28), Bank 1 - Incorrect Correlation


Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.

Timing Issue.
Camshaft Adjuster.
Timing belt jumped.
Timing chain has jumped tooth or chain stretched.

Possible Solutions:
Check Setting of Timing Belt.
Check Timing of Intake/Exhaust Cams.
Check Cam Adjusters as per Repair Manual.
Permissible deviation < -11° CRK or Permissible deviation > 11° CRK.

Special Notes:
North American Region (NAR) specific notes:
When found in 2009 Audi A4, A5 or Q5 with 3.2 FSI AVE Engines, please see Technical Service Bulletin (TSB) 15-09-04.
When found in 2008 and newer VW 2.0T engine with a timing chain (example; CCTA and CBFA), please see Technical Service Bulletin (TSB) 15-12-01 or Technical Product Information (TPI) 2028302 for no-start timing chain related problems.

Cam Chain

VAG Error Code: 16685/15125/10591/4054/000769
EOBD II Error Code: P0301

Fault Location:
Cylinder 1 - Misfire Detected

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/loss of power.
Hard start.
Engine hesitation.

Wiring/Connector(s).
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine Control Module (ECM) damaged.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Do a compression test.
Read Measuring Value Blocks (MVB) 15 if misfire changes location.

Special Notes:
This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

Tech Notes:
The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persist more tests needs to be done to diagnose problem.

Description:
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor (G28)/Crankshaft Position Sensor (G28) signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

VAG Error Code: 16686/15128/10592/7115/8736/4057/000770
EOBD II Error Code: P0302

Fault Location:
Cylinder 2 - Misfire Detected

VAG Error Code: 16687/10593/6352/4060/000771
EOBD II Error Code: P0303

Fault Location:
Cylinder 3 - Misfire Detected

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/loss of power.
Hard start.
Engine hesitation.

Wiring/Connector(s).
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine Control Module (ECM) damaged.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Do a compression test.
Read Measuring Value Blocks (MVB) 15 if misfire changes location.

Special Notes:
This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

Tech Notes:
The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 3. If the problem persist more tests needs to be done to diagnose problem.

Description:
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor (G28)/Crankshaft Position Sensor (G28) signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

VAG Error Code: 16688/10594/4063/000772
EOBD II Error Code: P0304

Fault Location:
Cylinder 4 - Misfire Detected

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/loss of power.
Hard start.
Engine hesitation.

Wiring/Connector(s).
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine Control Module (ECM) damaged.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Do a compression test.
Read Measuring Value Blocks (MVB) 15 if misfire changes location.

Special Notes:
This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

Tech Notes:
The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4. If the problem persist more tests needs to be done to diagnose problem.

Description:
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor (G28)/Crankshaft Position Sensor (G28) signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

VAG Error Code: 16689/000773
EOBD II Error Code: P0305

Fault Location:
Cylinder 5 - Misfire Detected

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/loss of power.
Hard start.
Engine hesitation.

Wiring/Connector(s).
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine Control Module (ECM) damaged.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Do a compression test.
Read Measuring Value Blocks (MVB) 15 if misfire changes location.

Special Notes:
This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

Tech Notes:
The P0305 code means that the cylinder 5 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 5. If the problem persist more tests needs to be done to diagnose problem.

Description:
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor (G28)/Crankshaft Position Sensor (G28) signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

As taken from my new EOBD II Fault Codes Software

 

New Developments,
I checked the plugs and they looked fine. wire brushed and reset gaps and reinstalled, and replaced the crank sensor, plan to replace cam sensor as well but it was out of stock and I have not had a chance to get back to part store. Looked over the wiring, did not see anything obviously rubbed and or damaged.
I have been driving it and as I said it runs fine over 1000-1200 RPM but is terrible at idle. So today on the way to work the EPC light has come on, quick internet visit and it looks like throttle or throttle Body? hopefully this is what has been causing the idle issue as well and now I have a hard code. Can some one direct me to a diagnostic stream for this?
Thanks

 

Also there are numerous mentions G#'s for various sensors. where can I find this list to reference?
Thanks again

 

Each component has an ID number there are hundreds of them.

e.g.

Engine Speed (RPM) Sensor (G28)/Crankshaft Position Sensor (G28)
Airbag Seat Detect Sensor (G128)
Ambient (Outside) Air Temperature Sensor (G17)
Anti-Lock Brake System (ABS) Wheel Speed Sensor: Rear Left (G46)
Anti-Theft System Sensor (G578)
Camshaft Position (Hall) Sensor (G40)
Coolant Temperature Sensor (G2)

 

I have a hard code. Can some one direct me to a diagnostic stream for this?
Thanks

 

She went to the scrap yard, VW charged me 150.00 to to tell me I needed a 1800.00 repair on a car I paid 300.00 for?
The car was literally like new other than the engine problems so I guess they thought I would cough up for the repair.

 

Hard start. Engine hesitation.