Hi Guys, this is my first post.

I have a 2003 Polo 9N 1.2 (yeah i know!)

I am having problems starting, sometimes it starts fine, but idles a litte bit high, and other times it just stutters and dies. I have ran VAG-COM and these are my fault codes:

VAG-COM Version: Release 409.1-S

Chassis Type: 9N - VW Polo

Scan: 01,02,03,08,09,15,17,19,37,44,45,46,55,56,69

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Address 01: Engine

Controller: 03D 906 032 C

Component: 1,2l/2V SIMOS3 00HS2501

Coding: 00031

Shop #: WSC 00788

WVWZZZ9NZ3Y243932 VWZ7Z0C6763596

4 Faults Found:

16500 - Engine Coolant Temp. Sensor (G62): Implausible Signal

P0116 - 35-10 - - - Intermittent

16686 - Cylinder 2 Misfire Detected

P0302 - 35-10 - - - Intermittent

16556 - Fuel Trim: System Too Rich: Bank 1

P0172 - 35-10 - - - Intermittent

17658 - Fuel Level too Low

P1250 - 35-00 - -

Readiness: 0000 0000

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Address 03: ABS Brakes

Controller: 6Q0 907 379 L

Component: ABS FRONT MK60 0101

Coding: 0001097

Shop #: WSC 00788

No fault code found.

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Address 09: Cent. Elect.

Controller: 6Q1 937 049 C

Component: 00 BN-SG. 1S33

Coding: 25742

Shop #: WSC 00788

2 Faults Found:

01336 - Data Bus for Comfort System

49-10 - No Communications - Intermittent

01598 - Drive Battery Voltage

07-10 - Signal too Low - Intermittent

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Skipping Address 15-Airbags

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Address 17: Instruments

Controller: 6Q0 920 900 H

Component: KOMBI+WEGFAHRSP VDO V15

Coding: 01431

Shop #: WSC 00000

WVWZZZ9NZ3Y243932 VWZ7Z0C6763596

No fault code found.

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Address 19: CAN Gateway

Controller: 6N0 909 901

Component: 10 GATEWAY CAN 1S33

Coding: 00014

Shop #: WSC 00788

1 Fault Found:

01336 - Data Bus for Comfort System

49-10 - No Communications - Intermittent

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Address 44: Steering Assist

Controller: 6Q0 423 156 AB

Component: LenkhilfeTRW V270

Coding: 10110

Shop #: WSC 00000

No fault code found.

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Address 46: Central Conv.

Controller: 6Q0 959 433 G

Component: 41 Komfortgerát 0002

Coding: 00017

Shop #: WSC 00788

No fault code found.

End --------------------------------------------------------------------------------------------------

I would appreciate your help very much as I am not too good with cars!

Andy

Edited 28 July, 201016 yr by legenderi32

clear the codes and run the car for a couple of days and re-scan. the ones showing now might not all be current faults.

clear the codes and run the car for a couple of days and re-scan. the ones showing now might not all be current faults.

Cheers for replying, ok i've cleared the codes. I'll post them again in a cpl of days and c wots coming up then.

Without doubt your fault lies with your coolant temp sensor.

16500 - Engine Coolant Temp. Sensor (G62): Implausible Signal

I have 1.2 12v 9n2 and the same problem. Idles too fast and you find if the engine is warm it is very hard to start.

Easy job to do. Locate sensor and remove wiring plug, remove underpanel from front bumper to provide access to coolant drain tap and drain coolant. Return to sensor, remove retaining pin and remove sensor (just pulls out) fit new sensor ensuring to use new seal, insert pin, close coolant drain tap, replace underpanel, fill coolant and watch the fault disappear!

20 min job tops!

hey guys cheers for your help.

I have ran the car for about a week, engine management light came on again, ran VAG-COM and here's what came up:

VAG-COM Version: Release 409.1-S

Control Module Part Number: 03D 906 032 C

Component and/or Version: 1,2l/2V SIMOS3 00HS2501

Software Coding: 00031

Work Shop Code: WSC 00788

Additional Info: WVWZZZ9NZ3Y243932 VWZ7Z0C6763596

2 Faults Found:

16500 - Engine Coolant Temp. Sensor (G62): Implausible Signal

P0116 - 35-00 - -

16556 - Fuel Trim: System Too Rich: Bank 1

P0172 - 35-10 - - - Intermittent

Is this definately the coolant sensor? I have replaced the coolant sensor before, but i did not drain and top up the coolant. Thanks!