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Discussion Starter #1
Hello,

I am facing issues with engine vibration and got fault code-P0201 Cylinder 1 Injector Circuit Malfunction.

Checked in erWin and got the following connection diagram for fuel injectors
Electricals.png

Checked individual Fuel Injector for sort and got 1 Ohm for all 3 of them.

Tapped 31 and 46 at ECU connection and tested for wiring continuity using multimeter, reading is 1 Ohm (Same as other 2 injectors). This should rule out harness/loom fault.
ECU-terminal.jpg

Now I am feeling a bit helpless. Do you suggest any other checks?
 

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Discussion Starter #2
Looks like injector fault.

I have swapped injectors of Cylinder-1 & Cylinder-2, then I got error code P0202 - Cylinder 2 Injector Circuit Malfunction instead of P0201.

I hope replacing injector will solve this issue.
 

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If you swapped injector 1 with injector 2 and the code switched to P0201 it sounds like a bad injector. You need VAG-COM\VCDS to check values and compare.

VAG Error Code: 16585/000513

EOBD II Error Code: P0201

Fault Location:
Fuel Injector for Cylinder 1 (N30) - Circuit Malfunction/Open Circuit

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/Loss of Power.
The engine may be harder to start.
Engine hesitation.

Wiring/Connector(s).
Fuel Injector for Cylinder 1 (N30).
Engine Control Module (ECM).

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Low side signal current < 2.1 A.

When is the code detected?:
The P0201 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 1.

Description:
Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The Engine Control Module (ECM) will trigger the P0201 code when the resistance or voltage drop at the injector 1 is out of specifications.

VAG Error Code: 16586/000514

EOBD II Error Code: P0202

Fault Location:
Fuel Injector for Cylinder 2 (N31) - Circuit Malfunction/Open Circuit

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Lack/Loss of Power.
The engine may be harder to start.
Engine hesitation.

Wiring/Connector(s).
Fuel Injector for Cylinder 2 (N31).
Engine Control Module (ECM).

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Low side signal current < 2.1 A.

When is the code detected?:
The P0202 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 2.

Description:
Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The Engine Control Module (ECM) will trigger the P0202 code when the resistance or voltage drop at the injector 2 is out of specifications.


As taken from my new Free EOBD II Error Codes software
 
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