View Full Version : '08 2.0T CEL With 04506, 08583, 08577
No driveability issues or discernible symptoms besides the CEL according to the primary driver of the car. It is worth mentioning that the car had burned some oil in the past week, which it has not done in the past 50,000 miles.
I can't seem to figure out how the three codes it was throwing interact with each other. I decided to reset them and see if the CEL comes back.
18613/P2181/008577 - Performance Malfunction in Cooling System
P119A/004506 - Fuel Pressure Sensor (G247) : Malfunction
18619/P2187/008583 - Bank 1; System too Lean at Idle
Any thoughts?
LRS/GSR
11-18-2019, 09:20 PM
Log block 230 and 231. What are your fuel trims? Coolant temp sensor can give excessively hot or cold temp when it fails. Example if it fails cold will usually read - 41 degrees even if it's 90 out. Vastly out of range coolant temp can cause adjustment to fuel trims. Look there first it's easiest to diagnose.
EvolutionArmory
11-19-2019, 03:42 AM
Your first code is most likely a coolant temp sensor or thermostat. Super easy to diagnose with VCDS by just watching the coolant temp measured value block. Start the car, note the current temp. It should be close to ambient temp within a few degrees if it’s been parked overnight. If it’s off, the sensor is faulty. You can also take off the coolant return hose to the coolant reservoir and rev the car up to make sure you’re getting coolant flow back to the reservoir. If there’s no coolant flow back to the bottle, then maybe you have a bad water pump.
If the sensor is good, rev the engine to 1500 and watch the temp. It should rise enough to open the thermostat. When the thermostat opens the temp will drop a little. If the coolant temp never reaches the temp to open the thermostat then you know the thermostat is stuck open and should be replaced. Also watch your temp gauge. If it never reaches the middle, the thermostat is stuck open. If it overheats, maybe it’s stuck closed.
Your second code is for the low pressure fuel sensor on the HPFP. Use a mechanical pressure gauge and compare what actual low pressure fuel readings are with what VCDS says it is. If the sensor data is off replace the sensor. You can also check the old sensors internal resistance to a new one. If it’s really off, install the new one. You should also make sure the low pressure sensor is getting power. This could also be caused by a high pressure fuel pump related failure.
Your third code could be related to your second code but lean codes could be many things. Diagnosing fuel trim codes is auto mechanics 101 so you’ll need to do all the standard tests for fuel trim issues.
I hope that helps point you in the right direction at least.
EvolutionArmory
11-19-2019, 04:54 AM
And since you mention oil burning and a lean code, I’d look at the PCV system as a possible cause of the lean code. This means checking/replacing the PCV valve, breather tube and pressure testing the valve cover to make sure the PCV passageways in the valve cover aren’t separating.
Also make sure the rear main seal isn’t leaking. This can cause a lean code at idle.
So the codes never came back after I cleared them about 150 miles ago and the car hasn't burned any oil since then either. Weird.