I own a vw jetta,2004 model. The check engine

Question edited for clarity and toss in some CAPS.
Question moved to model category.

P2177 is Fuel Air sensor showing Lean mixture, so it is dumping more fuel and sooting up plugs and the catalytic converter. After fixing, you will need a system cleaning additive.

https://www.google.com/search?q=2004+Volkswagen+Jetta+2.0+P2177

P2177 is on a similar theme

https://www.dtcdecode.com/Volkswagen/P3211

https://www.google.com/search?q=2004+Volkswagen+Jetta+2.0+P3211

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First off, let's simply define the OBD-II Trouble Codes:
Yes, 18032/P1624/005668 are the three codes that indicate "MIL Request Signal Active."
So, what does THAT mean (in plain English)??? This means that Fault Codes are stored in the TCM. SO WHAT'S THE SOLUTION?
MyAirbags has a reset solution for 04-07 VW Jetta 1.8L/2.0L https://www.myairbags.com/product/vw-jetta-2004-2007-1-8l2-0l-ecu-ecm-pcm-repair/ as well as the VW Jetta 02-06 2.5L/2.8L
https://www.myairbags.com/product/vw-jetta-2002-2006-2-5l2-8l-ecu-ecm-pcm-repair/
You need to have the TCM reset to its original status. https://www.myairbags.com/how-it-works/ecu-ecm-pcm-tcm-unit-repair https://www.myairbags.com/engine-control-unit-repairs-ecu-faqs

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

did you replace stereo

The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:

1. ECT sensor 1 placed on cylinder head:




2. ECT sensor 2 placed on the left bottom side of the radiator:

Timing Belt Spanner Wrench
AST tool# H 2587-1

- Used for the Adjustment of the Timing Belt
- Applicable to 2004-2005 VW Golf, Jetta Pump Duse and 2002-2005 Audi 3.0 V6

Used for the adjustment of the timing belt.

2009 Suggested user price: $52.67

Assenmacher Specialty Tools
1 800 525 2943
Timing Belt Spanner Wrench
AST tool# H 2587-2

- Used for Adjusting the Timing Belt Tension

• Applicable to 1999 and later VW Golf and Jetta, Passat and 1999-2003 VW Beetle with 2.0L Gas Engine and 1.9L T.D.I. Diesel Engine

Used for adjusting the timing belt tension and is comparable to VW tool# T10020. Applicable to 1999 and later VW Golf and Jetta, and 1999-2003 VW Beetle with 2.0L gas engine and 1.9L T.D.I. diesel engine.

2009 Suggested user price: $52.67

Assenmacher Specialty Tools
1 800 525 2943

VW's somehow got around disclosing what the check engine lite codes mean to anyone except a VW Dealer. Therefore, to eliminate another service charge from a local repair shop I recommend you take the vehicle to VW and have them scan the vehicle's ECU for codes and do the repair accordingly.

coolant temp sensor indicating when engine is at operating temp by going off.

Loss of power? How many miles? Plug, plug wire or ignition coil(if seperate poles) would be my guess.

to get into rear light area take out the side interior trim panels and sill the go from their/ check fuses first