Question about 2001 Volkswagen Beetle

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I HAVE A 2001 BEATTLE WITH A 2.0 L.THE EPC LIGHT COME ON ALSO THE CHECK ENGINE LIGHT .I HAVE A PO121 CODE AND ALSO A PO221.IT LOST POWER,AND.SOMETIMES WHEN I RESTART THE CAR THE EPC LITE GOES OUT AND THE POWER COMES BACK.

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  • Volkswagen Master
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Hi.

Both P0121 and P0221 indicate that the throttle position sensor (TPS) is out of range.

The TPS is located on the throttle body, and sends to the ECU (main computer) a current signal that is used to elaborate position of the throttle and opening of butterfly valve.

The TPS is tested by using a Voltmeter to read volts on TPS cable, while the pedal is pressed slowly and smoothly. If there are gaps or peaks in voltage, and Volts do not go up smoothly, then the TPS is not working porperly. In that case replace throttle body or throttle body connector.

TPS faults typically cause performance problem, cause the auto transmission working incorrectly, and will turn on the check engine light when the problem is detected by the ECU.

On different VoksWagen models this problem was caused by factory defects. A service bulletin was issued. I suggest calling the local dealer and asking if your car is affected by recall. I have found recall for Passat only, but New Beatle and Passat models share the same engine in some case. In that case reapir will be covered, otherwise you will have to replace wiring harness or throttle body at your expenses.

Here the bulletin for Passat.

Regards.

Posted on Apr 28, 2010

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Posted on Jan 02, 2017

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1 Answer

My engine light is on, had it diagnosed. Can you explain F.P.C. solenoid circuit in a mazda, where is it located and cost involved to repair?


Step 1:

P1745 - Transmission system problems.

The code for this concern is related to the EPC solenoid in the transaxle.

P1745 EPC EPC solenoid circuit failure EPC solenoid, circuit or PCM shorted or open. Soft/harsh shift feel

The wire to the EPC solenoid is a yellow and violet wire.The code indicates that the problem is strictly caused by this solenoid circuit. I would suggest inspecting this wire from the trans to the PCM.If there are no obvious faults, replace the wire with a new wire ,eliminating the faulty circuit. Hope this helped you.

Step 2:

It's located inside the transmission. You must remove the pan and filter to get access to it.

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The check engine light:
tdisline_743.jpg

The check engine light & EPC light:
tdisline_744.jpg

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1 Answer

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The check engine light:
tdisline_743.jpg
The check engine light & EPC light:
tdisline_744.jpg


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1 Answer

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The check engine light:
tdisline_743.jpg


The check engine light & EPC light:
tdisline_744.jpg

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1 Answer

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First of all you need to access the Engine Control Module (ECM) using suitable diagnostic equipment connected to the data link connector of the car, in order to pull out all DTC's memored. DTC = Diagnostic Trouble Code. Then you will bu full informed about the root cause of the problem, and you will be able to repair & replace bad pieces and reset the ECM. Then the EPC (Electronic Pedal Control) yellow light will turn OFF.

The check engine light:
tdisline_743.jpg
The check engine light & EPC light:
tdisline_744.jpg

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1 Answer

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