Stock LC 20VT logs, advice needed

[tonipieleanu]

I've done a few logs the other day to check for my ongoing problem.
I'm getting the following error:

17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent

I've changed the lambda sensor with a new one (NTK/NGK) and I'm still getting the error.

In group 032 my values are as follows:

field 1 (additive) = -0.6%
field 2 (multiplicative) = +18%


Groups 002 & 031

Tuesday	17	March	2009	15:21:16						
06A 906 032 T  		1.8L R4/5VT         0003								
										
	Group A:	'002				Group B:	'031			
		Idle speed	Engine load	Inj. period	Air mass in		Voltage	Voltage	Bin. Bits	Bin. Bits
	TIME	700-820 rpm	15-25%	2.0 - 4.0 ms	2.0-4.5 g/s	TIME				
MARKER	STAMP	 /min	%	 ms	 g/s	STAMP	 V	 V		

	160.04	2240	40.6	8.61	38.72	160.44	0.7	0.155
	160.84	2400	86.5	12.71	44.44	161.24	0.81	0.715
	161.64	2720	114.3	17.22	60.67	162.04	0.855	0.835
	162.44	3080	116.5	17.63	66.36	162.84	0.87	0.845
	163.24	3400	115.8	17.63	75.94	163.64	0.895	0.86
	164.04	3720	136.1	20.5	79.06	164.44	0.9	0.86
	164.84	4080	133.8	20.09	85.78	165.24	0.895	0.84
	165.64	4360	137.6	20.09	94.14	166.04	0.89	0.845
	166.44	4680	137.6	20.91	101.92	166.84	0.9	0.82
	167.24	4960	136.8	21.32	107.39	167.64	0.9	0.805
	168.04	5240	135.3	21.32	114.31	168.54	0.89	0.785
	168.94	5560	135.3	21.73	122.08	169.34	0.89	0.765
	169.74	5800	133.8	22.14	125.25	170.14	0.88	0.74
	170.54	6040	122.6	19.68	89.28	170.94	0.895	0.76

Groups 115 & 118

	Group A:	'115				Group B:	'118			
		Engine Speed	Engine Load	Spec. Boost	Actual Boost		Engine Speed	Air Temp In	Boost Dut Cyc	Actual Boost
	TIME	700-6800 RPM	15-150%	990-1800 mbar	<=1800 mbar	TIME	700-6800 RPM	<=110 C	0-100% 	<=1800 mbar
MARKER	STAMP	 /min	%	 mbar	 mbar	STAMP	 /min	°C	%	 mbar

2.8	2080	14.3	1060	1010	2.4	2080	39	0	1020
3.6	2240	82	1870	1240	3.2	2120	39	100	1070
4.4	2560	109.8	1850	1680	4	2400	39	100	1450
5.2	2920	117.3	1770	1820	4.8	2720	39	65.5	1820
6.09	3360	115.8	1700	1730	5.6	3120	38	60.8	1780
6.89	3680	134.6	1700	1690	6.49	3520	38	58.8	1710
7.69	4040	132.3	1720	1670	7.29	3840	39	58.4	1670
8.51	4360	136.1	1700	1690	8.09	4200	39	60.4	1680
9.5	4760	137.6	1700	1670	8.99	4560	40	62.4	1690
10.3	5080	136.1	1690	1640	9.9	4920	42	62.4	1650
11.1	5360	134.6	1720	1640	10.7	5200	44	63.9	1630
11.9	5640	134.6	1710	1660	11.5	5520	45	67.5	1660
12.7	5880	133.1	1640	1650	12.3	5760	48	69	1670
13.5	6160	128.6	1590	1620	13.1	6000	50	68.2	1630
14.3	4880	97.7	1650	1340	13.9	5560	50	0	1350
15.1	4960	136.8	1700	1670	14.7	4880	51	63.5	1700
15.99	5080	132.3	1000	1470	15.59	5040	52	63.9	1670

Groups 120 & 031

Tuesday	17	March	2009	15:24:46				
06A 906 032 T  		1.8L R4/5VT         0003						
								
	Group A:	'120				Group B:	'031	
		Engine Speed	Spec Load	Curr Load	ASR Status		Voltage	Voltage
	TIME	700-6800 RPM	0-399 Nm	0-260 Nm	active yes/no	TIME		
MARKER	STAMP	 /min	 Nm	 Nm		STAMP	 V	 V

12.49	2240	399.8	0	ASR OFF	12.89	0.05	0.155
13.29	2360	399.8	103.9	ASR OFF	13.69	0.81	0.38
14.09	2600	399.8	164.6	ASR OFF	14.49	0.835	0.795
14.89	2960	399.8	199.9	ASR OFF	15.29	0.86	0.865
15.69	3320	399.8	199.9	ASR OFF	16.09	0.86	0.86
16.49	3640	399.8	239.1	ASR OFF	16.89	0.895	0.89
17.29	4000	399.8	235.2	ASR OFF	17.69	0.89	0.88
18.09	4280	399.8	243	ASR OFF	18.49	0.885	0.865
18.89	4640	399.8	243	ASR OFF	19.31	0.89	0.86
19.8	4960	399.8	241.1	ASR OFF	20.2	0.9	0.855
20.7	5280	399.8	227.4	ASR OFF	21.1	0.9	0.855
21.51	5560	399.8	229.3	ASR OFF	21.9	0.88	0.825
22.3	5800	399.8	223.4	ASR OFF	22.7	0.885	0.81
23.1	6080	399.8	213.6	ASR OFF	23.51	0.71	0.795

PS: my lambda sensor is narrow band, so in group 031 those are volts, NOT AFR.


I appreciate any input.

 

[tonipieleanu]

Anyone?

 

[DPJ]

I'm confused, Leon 031 lambda's are normally wideband. Do you know what the voltage translates to?

 

[tonipieleanu]

Mine car was biult in 2000, so it's a bit old. When I've replaced the lambda sensor, I've checked the NTK catalog and the equivalent for the code I got ftom the lambda sensor is narrow band.

It's a bit unsual, but I've seen other Golf's that also have narrow band sensors.

After reading here, the equation to compute AFR from lambda voltage is: AF = -19.351Ln(V) + 10.65. Of course this is just an approximation.

 

[DPJ]

I suppse the lambda plugs will be different (number of wires) , so you couldn't fit a narrowband to a wideband connector...

The 'internal resistance too high' must say something though....

 

[DPJ]

A quick look for the code '17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High' seems to point to MAF problems - I can't remember, did you fit a new one....?

 

[tonipieleanu]

Yes, plugs are different. 5 wires for wideband and 4 wires for narrowband. Also, something in the ECU is different.

MAF is less than 6 months old.

I'll try to measure the cable's resistance from lambda sensor to ECU. By reading group 041 in Vag-com, I get a 4-7kohm resistance for the lambda and when I measure it directly on the plug I get 10ohms?!

 

[DPJ]

Hmmm, could be cable damage............

 

[tonipieleanu]

I've tried to measure the cables that leed to the ECU but I've had no luck. I had a wiring diagram from an AEB 1.8T engine but this doesn't match with my AUQ.

Does anybody have a pinout for ECU connector? Or at least what pins come from the lambda sensors...

 

[Yosh]

Take the lambda voltage values and multiply by 14.7 to get AFR...

BTW, I get B1S1 internal resistance too low...Not always though and I have changed Lambda and MAF...