2000 VW 1.8T - Rough Idle, Stalling and Limp Mode

[The Critic]

Vehicle: 2000 Beetle 1.8T

Complaints:

1) Hard Start when cold, stalling
2) Vehicle won’t accelerate past 2500rpm when cold (sounds like it’s in limp mode), EPC and ASR lights are on
3) Vehicle operates normally when warm, but with a slight rough idle.

Notes:
1) After clearing faults, only the P1116 is active. However, I have not re-scanned the vehicle after a cold start.
2) Past service history indicates prior issue with throttle body after cleaning and multiple adaptations.

I think I need to re-scan the vehicle (after a cold start), replace the upstream oxygen sensor and check for bad grounds. What do you guys think?

See scan from VAG-COM:

Quote:

VCDS Version: Release 14.10.2 (x64)
Data version: 20150311
www.Ross-Tech.com

Monday,20,April,2015,19:42:27:58785

Chassis Type: 9C - VW New Beetle (1999 > 2010)
Scan: 01 02 03 08 15 17 19 22 25 26 29 35 37 39 46 54 56 65 75

Mileage: 206600km-128375miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06A-906-032-AVC.lbl
Part No: 06A 906 032 C
Component: 1.8l 5VT NB HS G 3077
Coding: 00001
Shop #: WSC 00066
VCID: 1E339F4B9A5274D17C3-5140

16 Faults Found:
17967 - Throttle Body (J338)
P1559 - 35-10 - Fault in basic settings - Intermittent
16486 - Mass Air Flow Sensor (G70)
P0102 - 35-10 - Signal too Low - Intermittent
17524 - Oxygen (Lambda) Sensor Heating; B1 S1
P1116 - 35-00 - Open Circuit
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - Intermittent
16688 - Cylinder 4
P0304 - 35-10 - Misfire Detected - Intermittent
17633 - Fuel Injector for Cylinder 1 (N30)
P1225 - 35-10 - Short to Ground - Intermittent
17635 - Fuel Injector for Cylinder 3 (N32)
P1227 - 35-10 - Short to Ground - Intermittent
17636 - Fuel Injector for Cylinder 4 (N33)
P1228 - 35-10 - Short to Ground - Intermittent
17634 - Fuel Injector for Cylinder 2 (N31)
P1226 - 35-10 - Short to Ground - Intermittent
17833 - EVAP Purge Valve (N80)
P1425 - 35-10 - Short to Ground - Intermittent
17955 - Boost Pressure Regulation Valve (N75)
P1547 - 35-10 - Short to Ground - Intermittent
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2
P1117 - 35-10 - Short to Ground - Intermittent
17843 - Secondary Air Pump Relay (J299)
P1435 - 35-10 - Short to Ground - Intermittent
17829 - Secondary Air Injection Solenoid Valve (N112)
P1421 - 35-10 - Short to Ground - Intermittent
17697 - Boost Pressure Control Valve (N249)
P1289 - 35-10 - Short to Ground - Intermittent
17953 - Throttle Valve Controller
P1545 - 35-10 - Malfunction - Intermittent
Readiness: 0000 1000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1J0-907-37x-ABS.lbl
Part No: 1J0 907 379 AF
Component: ASR 20 IE CAN 0001
Coding: 13204
Shop #: WSC 00066
VCID: 75E1A0E74F2497894D9-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 6Q0 909 605 A
Component: 06 AIRBAG VW5 0004
Coding: 12342
Shop #: WSC 00066
VCID: 356160E70FA4D7898D9-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1C0-920-xx0.lbl
Part No: 1C0 920 901 F
Component: KOMBI+WEGFAHRS. M73 V07
Coding: 07202
Shop #: WSC 00000
VCID: 1F4DA24F9D587DD9775-4B00

Subsystem 1 - Part No: Ident
Component: Nr. Wegfahrs.:VWZ5Z0Y1181414
Ident.-Nr. Wegfahrs.:VWZ5Z0Y1181414

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway KCAN V072
Coding: 00006
Shop #: WSC 00066
VCID: 70EF91F33046B2A19EF-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1J0-959-799.lbl
Part No: 1J0 959 799 AJ
Component: 5X Zentral-SG Komf. 0001
Coding: 00256
Shop #: WSC 00066
VCID: 0603D72B22C28C11543-4B00

Subsystem 1 - Part No: 1J2959802C
Component: 5X Tõrsteuerger. FS0002r

Subsystem 2 - Part No: 1J2959801D
Component: 5X Tõrsteuerger. BF0002r

2 Faults Found:
00943 - Heated Exterior Mirror; Driver Side (Z4)
35-00 - -
00944 - Heated Exterior Mirror; Passenger Side (Z5)
35-00 - -

-------------------------------------------------------------------------------
Address 54: Rear Spoiler Labels: 1C0-959-733.lbl
Part No: 1C0 959 733 B
Component: Heckspoiler 0002
VCID: 2A5B439BD61A887110B-51B6

No fault code found.

End-------------------------(Elapsed Time: 04:11)--------------------------

 

[Quattro Pete]

Does this help at all?

http://wiki.ross-tech.com/wiki/index.php/17524/P1116/004374

 

[Kamele0N]

Check well known problem with these engines first....clogged breather (hose) for oil vapors in engine head...

 

[BRZED]

Check the coolant temperature sensor. If it is defective, on many cars the engine will run in limp mode.

 

[Trav]

O2 sensor heater. Check it for power and good ground when cold if its good change the front o2.

 

[Gtiguy34]

Most of those faults are probably erroneous, if I remember correctly a bad fuel pump relay or main relay will cause all of the open circuit faults. I would start there and see what comes back.

 

[threeputtpar]

What value are you seeing in Engine Group 001 in place 2? That will be the CTS reading from the coolant, and what you describe sounds like it should be reading a real weird number when the engine is cold and it doesn't know what A/F ratio to run until it actually warms up. Common VAG issue from 1998 - 2006.

The updated CTS should be bright green instead of black or blue.

Here's the link to the table of Group numbers:

http://www.ross-tech.com/vag-com/m_blocks/

 

[Trav]

Originally Posted By: Trav
O2 sensor heater. Check it for power and good ground when cold if its good change the front o2.


This is probably wrong. I didn't see all the codes you had from the scan tool. Even if it had a bad heater circuit it wouldn't cause all that.

 

[CBR.worm]

Bad ECU? Bad ground?