Traction control light

[Brav]

After chipping with Revo, and doing other logs, I notice the traction control light comes on only when shifting from say 3 to 4 under WOT. It comes on right as it shifts. Then it stays on for about 5 seconds or so, then goes off... Its impossible that I was slipping at all. Tried 3 times now, keeps doing it.. any ideas?

[Hy Octane]

Stop doing that?

[JSRS6]

[Brav]

brilliant.

[JSRS6]

Did you vag it? Any codes?

[Brav]

Monday,07,November,2011,18:51:37:26687
VCDS Version: Release 10.6.5 (x64)

Address 01: Engine Labels: 077-907-558-BCY.lbl
Control Module Part Number: 4D1 907 558 D
Component and/or Version: 4.2l V8/5VT G 0003
Software Coding: 0006752
Work Shop Code: WSC 13876 409 403238
VCID: 2F67E54FC786
2 Faults Found:

16487 - Mass Air Flow Sensor (G70): Signal too High
P0103 - 001 - Upper Limit Exceeded - Intermittent
17482 - Mass Air Flow Sensor 2 (G246): Signal too High
P1074 - 001 - Upper Limit Exceeded - Intermittent

Readiness: 0000 0001

Monday,07,November,2011,18:52:15:26687
VCDS Version: Release 10.6.5 (x64)

Address 03: ABS Brakes Labels: 4B0-614-517.lbl
Control Module Part Number: 4B0 614 517 AD
Component and/or Version: ESP 5.7 RS 6 2310
Software Coding: 06697
Work Shop Code: WSC 02195
VCID: 63CF597FDBCE
3 Faults Found:

18258 - Powertrain Data Bus: Missing Message from ECU
P1850 - 35-10 - - - Intermittent
01119 - Gear Recognition Signal
35-10 - - - Intermittent
18265 - Load Signal: Error Message from ECU
P1857 - 35-10 - - - Intermittent


I have gotten the gear recognition signal error off an on for a while, the other 2 above are new.

Monday,07,November,2011,18:55:18:26687
VCDS Version: Release 10.6.5 (x64)

Address 02: Auto Trans Labels: 01L-927-156.lbl
Control Module Part Number: 4B0 927 156 FL
Component and/or Version: AG5 01L 4.2l5VT USA 0305
Software Coding: 0000002
Work Shop Code: WSC 02195 785 00200
VCID: 76E9102B785C
1 Fault Found:

18258 - Powertrain Data Bus: Missing Message from ECU
P1850 - 003 - Mechanical Failure - Intermittent


Same as above basically.

[JSRS6]

You taken your air box off recently? When did you get your revo?

[Brav]

Airbox, no. Revo was 2 weeks ago.

[JSRS6]

Ok, start with tune. Lets assume the dealer gave you the latest rev. What are your settings? Can you go back to stock? If so, do it and see if you can replicate the issue while stock. Did you ever notice the issue before? Is your tcu MTM'd?

[Brav]

Yes tcu is mtm. Never did it before. Settings are boost at 6, fuel and timing at 2. I will have to go in to get it flashed back to stock

[JSRS6]

Also, you are in drive? Not sport?

[Brav]

Yea, Drive. I did a few logs with it too I can post up in a bit.

[Brav]

OK I went over this thread which was a similar if not same issue as me:

http://www.rs6.com/showthread.php/18...ghlight=switch

High speed traction control light turning on, then off.. and throwing the same MAF codes

In reviewing my recent logs.,my very first log after clearing DTCs showed a requested boost of 2080, and actual trails behind somewhat by 200 mb or so, but peaks at 3000 rpm at 1930mb. and holds more or less around 1800-1900mb in the mid range.. it was going so fast I had to let off.. never took to redline. but A TASTE OF THE BEAST!!

Then all the subsequent logs appeared to be much lower requested boost, I suppose it went into limp mode? Requested was around 1600mb, and actual was 1450 at 4k rpm, had slight variation of 100mb or so up until close to 6k RPM. it was again trailing 200 mb or so behind requested. But at 6k rpm, requested went up, and then actual also went up to match it at 1730 or so. from 6k RPM to 6400.. and you can really feel that final kick at redline. This is consistent with how my car normally behaves. But its more pronounced with the chip.

Then, I noticed my MAF readings.. they climed all the way to 364.08 and held there from 6k rpm to 6480.. and even on the slight overboost during shift.. This is RIGHT when I get the traction control light, and of course the MAF out of range codes. No engine light, but when I VAG it they are there. Its also in this "pegged" MAF section, I see the throttle valve angle vary slightly.. may be nothing. To me this is a direct correlation to the problem, no way the MAF would read exactly the same during climbing power. But if my car is chipped, why can it not read over stock power? 364g/s equates to about 455hp.

Its strange, I have of course the lower requested boost problem, but also the trailing boost problem (which seems to go away at near redline?) Could it be N75? Why would the boost decide to match requested late in the game?

The saga continues.. so many clues, so few answers.

[Brav]

4th gear pull.. had to let off, got scurred.

Group A:	'003				Group B:	'115
	Engine Speed	Mass Air Flow	Throttle Valve Angle	Ignition		Engine Speed	Engine Load	Boost Pressure	Boost Pressure
TIME	(G28)	(G70 + G246)		Timing Angle	TIME	(G28)		(specified)	(actual)
STAMP	/min	g/s	%	°BTDC	STAMP	/min	%	mbar	mbar

1.34	2880	41.17	12.5	45	1.28	2880	19.5	1010	1030	1.31
1.45	2880	49.67	14.5	36.8	1.38	2880	27.1	1010	1030	1.42
1.57	2880	57.69	16.1	34.5	1.49	2880	34.6	1010	1030	1.53
1.67	2880	78.92	20.4	36.8	1.61	2880	41.4	1010	1020	1.64
1.78	2880	96.14	25.9	30.8	1.71	2880	52.6	1050	1030	1.75
1.89	2920	119.39	49.4	31.5	1.82	2920	64.7	1460	1040	1.86
2	2920	133.97	80.8	21.8	1.92	2920	78.2	1870	1070	1.96
2.09	2920	142.92	92.2	22.5	2.03	2920	85.7	2070	1150	2.06
2.2	2960	153.94	97.6	18	2.13	2960	92.5	2070	1230	2.17
2.31	2960	167.47	99.2	17.3	2.24	2960	100.8	2070	1320	2.28
2.42	3000	189.5	99.6	14.3	2.34	2960	108.3	2080	1420	2.38
2.53	3000	204.25	100	9	2.46	3000	119.5	2080	1560	2.5
2.62	3040	217.67	100	10.5	2.56	3040	128.6	2080	1670	2.59
2.76	3040	232.56	100	6.8	2.66	3040	138.3	2080	1800	2.71
2.87	3080	213.19	100	3	2.79	3080	150.4	2080	1930	2.83
2.97	3120	202.75	100	6	2.9	3120	153.4	2090	1940	2.93
3.09	3120	201.14	100	-2.3	3.02	3120	152.6	2080	1890	3.06
3.2	3160	203.42	100	-0.8	3.13	3160	149.6	2080	1840	3.17
3.31	3160	205.06	100	8.3	3.23	3160	148.1	2080	1820	3.27
3.4	3200	205.69	100	6	3.34	3200	145.9	2080	1790	3.37
3.51	3240	207.17	100	6	3.44	3200	145.9	2090	1790	3.48
3.62	3240	213.14	99.6	6	3.54	3240	144.4	2100	1790	3.58
3.74	3280	218.67	100	8.3	3.65	3240	144.4	2100	1790	3.69
3.84	3280	215.33	100	5.3	3.78	3280	145.1	2110	1790	3.81
3.93	3320	220.11	99.6	6.8	3.87	3320	145.1	2110	1790	3.9
4.04	3360	226.97	100	6.8	3.96	3320	146.6	2110	1790	4
4.15	3360	224.44	100	9.8	4.07	3360	145.9	2120	1800	4.11
4.26	3360	229.89	100	0.8	4.19	3360	148.1	2120	1800	4.23
4.37	3400	230.14	100	9	4.29	3400	148.9	2120	1810	4.33
4.48	3440	232.19	100	7.5	4.4	3400	149.6	2120	1810	4.44
4.58	3440	231.5	100	8.3	4.51	3440	149.6	2120	1810	4.54
4.68	3480	237.47	100	8.3	4.62	3440	150.4	2120	1810	4.65
4.78	3480	238.61	100	0.8	4.71	3480	150.4	2130	1830	4.74
4.9	3520	246.17	100	9.8	4.82	3520	151.9	2130	1830	4.86
5.01	3560	252.67	100	5.3	4.94	3520	154.1	2130	1840	4.98
5.12	3560	251.11	100	0	5.04	3560	155.6	2130	1850	5.08
5.23	3600	260.64	100	4.5	5.15	3600	156.4	2130	1870	5.19
5.33	3600	261.81	100	4.5	5.26	3600	157.9	2130	1870	5.29
5.46	3640	265.83	100	4.5	5.38	3640	158.6	2130	1880	5.42
5.56	3680	266.47	100	5.3	5.49	3640	158.6	2130	1900	5.52
5.68	3680	263.5	100	8.3	5.61	3680	159.4	2130	1900	5.65
5.77	3720	266.94	100	8.3	5.71	3680	159.4	2130	1900	5.74
5.87	3760	272.25	100	0.8	5.8	3720	160.9	2120	1910	5.84
5.98	3760	280.19	100	8.3	5.9	3760	160.9	2120	1920	5.94
6.08	3800	278.86	100	6.8	6.01	3760	161.7	2120	1930	6.04
6.21	3800	287.08	100	7.5	6.13	3800	162.4	2120	1940	6.17
6.31	3840	284.11	100	1.5	6.24	3800	164.7	2120	1950	6.27
6.43	3880	280.92	100	8.3	6.36	3840	163.9	2120	1970	6.4
6.52	3880	289.14	100	6.8	6.46	3880	164.7	2120	1970	6.49
6.64	3920	296.33	100	6.8	6.55	3880	165.4	2110	1960	6.59
6.77	3920	299.72	100	1.5	6.69	3920	166.2	2120	1980	6.73
6.88	3960	310.36	100	7.5	6.81	3960	166.9	2120	2000	6.85
6.99	4000	302.67	100	7.5	6.92	3960	169.2	2110	2020	6.96
7.09	4000	306.92	100	7.5	7.02	4000	168.4	2110	2030	7.05
7.19	4040	310.89	100	2.3	7.13	4040	169.2	2110	2040	7.16
7.3	4000	261.33	58	-4.5	7.23	4040	168.4	1060	2030	7.27
7.42	4040	38.64	7.8	-0.8	7.33	4040	136.8	1010	2010	7.37
7.52	4000	0	3.5	20.3	7.46	4040	47.4	1010	1910	7.49
7.63	4040	0	4.3	18	7.56	4000	19.5	1010	1630	7.6

[Brav]

2nd log, in limp mode it seems.. but trailing boost catches up. also note pegged MAF

Group A:	'003				Group B:	'115
	Engine Speed	Mass Air Flow	Throttle Valve Angle	Ignition		Engine Speed	Engine Load	Boost Pressure	Boost Pressure
TIME	(G28)	(G70 + G246)		Timing Angle	TIME	(G28)		(specified)	(actual)
STAMP	/min	g/s	%	°BTDC	STAMP	/min	%	mbar	mbar
55.36	3960	77.33	16.5	41.3	55.4	3960	44.4	1010	1210
55.46	4000	104.44	23.1	34.5	55.49	4000	57.9	1230	1150
55.55	4000	156.69	29.4	33	55.59	4000	75.9	1480	1180
55.67	4040	199.11	54.5	21.8	55.71	4080	97.7	1570	1260
55.78	4080	226.56	87.1	18.8	55.82	4080	109.8	1570	1380
55.88	4120	237.28	98	9.8	55.92	4120	118.8	1570	1430
55.99	4160	232.42	99.2	13.5	56.04	4160	121.8	1580	1450
56.11	4200	231.61	99.6	14.3	56.15	4240	121.1	1590	1450
56.21	4240	228.97	100	10.5	56.25	4240	121.1	1590	1430
56.34	4320	229.89	100	10.5	56.38	4320	121.1	1600	1400
56.45	4320	232.25	100	9.8	56.49	4360	120.3	1600	1380
56.57	4400	235.08	100	14.3	56.6	4400	117.3	1600	1400
56.67	4440	235.81	99.6	10.5	56.7	4440	118	1610	1390
56.79	4480	242.28	100	5.3	56.83	4480	119.5	1620	1370
56.89	4520	245.11	100	6	56.93	4520	118	1620	1400
56.99	4560	242.39	100	11.3	57.02	4560	118.8	1630	1390
57.1	4560	245.97	100	10.5	57.13	4600	118	1630	1380
57.19	4600	247.83	100	9	57.24	4640	118.8	1630	1400
57.32	4680	248.11	100	6.8	57.36	4680	118.8	1630	1400
57.44	4720	254.06	100	8.3	57.47	4720	119.5	1620	1410
57.55	4760	258.56	99.6	7.5	57.58	4760	119.5	1620	1410
57.65	4800	257	99.6	13.5	57.69	4800	121.1	1610	1400
57.77	4840	259.64	100	9.8	57.8	4840	120.3	1600	1410
57.88	4880	265.83	100	10.5	57.91	4880	118.8	1600	1410
57.99	4920	270.11	100	9.8	58.02	4920	120.3	1600	1400
58.11	4960	265.86	100	13.5	58.15	4960	119.5	1600	1390
58.22	5000	271.81	100	14.3	58.27	5040	120.3	1600	1390
58.35	5040	276.58	100	6.8	58.38	5080	118.8	1600	1410
58.46	5080	278.39	100	14.3	58.5	5120	120.3	1600	1390
58.58	5120	282.89	100	11.3	58.63	5160	121.1	1600	1380
58.71	5200	281.5	100	15	58.75	5200	119.5	1600	1420
58.83	5240	290.69	100	6.8	58.88	5240	121.8	1600	1400
58.97	5280	287.14	100	11.3	59.02	5280	122.6	1600	1400
59.1	5320	296.06	100	12	59.14	5360	123.3	1600	1380
59.24	5360	296.28	100	6.8	59.28	5400	121.8	1590	1400
59.37	5400	300.72	100	12	59.41	5440	123.3	1590	1390
59.49	5480	301.22	100	12	59.53	5480	122.6	1590	1400
59.61	5520	306.44	100	7.5	59.66	5520	122.6	1590	1400
59.76	5560	308.03	100	15	59.8	5560	121.8	1600	1410
59.9	5600	301.83	100	15	59.93	5640	124.8	1610	1400
60.01	5640	313.03	100	14.3	60.05	5640	126.3	1610	1420
60.12	5680	314.22	100	14.3	60.16	5680	126.3	1620	1420
60.26	5720	315.25	100	14.3	60.3	5760	125.6	1630	1420
60.39	5760	321.92	100	12	60.43	5800	127.8	1630	1450
60.51	5800	327.89	100	14.3	60.56	5800	128.6	1640	1460
60.64	5840	334.86	100	7.5	60.69	5880	130.1	1650	1460
60.77	5880	345.33	100	8.3	60.82	5880	131.6	1660	1490
60.91	5920	342.61	100	12.8	60.95	5960	133.1	1670	1510
61.04	6000	357.5	100	9.8	61.07	6000	135.3	1670	1550
61.16	6000	364.08	100	12	61.21	6040	138.3	1680	1580
61.28	6040	364.08	100	12.8	61.34	6080	140.6	1680	1610
61.41	6080	364.08	100	12.8	61.45	6120	142.1	1690	1630
61.53	6160	364.08	100	12	61.59	6160	145.1	1690	1670
61.66	6200	364.08	99.6	11.3	61.71	6200	146.6	1700	1700
61.79	6240	364.08	100	12	61.82	6280	148.1	1710	1720
61.91	6280	364.08	100	12	61.95	6280	149.6	1710	1740
62.04	6320	364.08	99.6	11.3	62.09	6320	150.4	1720	1750
62.17	6360	364.08	99.6	6.8	62.22	6360	151.1	1730	1750
62.31	6400	364.08	100	11.3	62.36	6440	149.6	1730	1750
62.46	6440	364.08	100	10.5	62.5	6440	149.6	1730	1770
62.57	6440	364.08	99.6	9.8	62.61	6440	150.4	1740	1780
62.71	6480	364.08	100	11.3	62.75	6440	151.9	1740	1810
62.82	6320	364.08	99.6	7.5	62.86	6080	160.9	1730	1820
62.95	5560	364.08	98.4	-6	62.99	5360	172.2	1580	1890
63.08	5040	364.08	51.4	-6.8	63.12	4840	163.2	1580	1970
63.2	4520	315.5	46.7	-3	63.23	4480	148.9	1650	1940
63.3	4560	272.33	45.5	6.8	63.35	4560	139.8	1640	1810
63.43	4560	258.5	48.6	11.3	63.46	4560	133.1	1650	1700

[4everRS]

Then, I noticed my MAF readings.. they climed all the way to 364.08 and held there from 6k rpm to 6480.. and even on the slight overboost during shift.. This is RIGHT when I get the traction control light, and of course the MAF out of range codes. No engine light, but when I VAG it they are there. Its also in this "pegged" MAF section, I see the throttle valve angle vary slightly.. may be nothing. To me this is a direct correlation to the problem, no way the MAF would read exactly the same during climbing power. But if my car is chipped, why can it not read over stock power? 364g/s equates to about 455hp.

This is the max Block 3 can calculate for MAF. Don't know why. If you log the blocks for each MAF (can't remember block #'s) they go higher and then you have to add them together.

I have to read through things again and will try to add more.

[Brav]

ahhhh thanks for that tip! thought it had something to do with the upper limit MAF codes..

[4everRS]

Not sure about those Maf codes. Have you replaced them recently?

I assume that spreadsheet in post #15 is also in 4th gear. Could you post a 3rd gear pull? (props to the 4th gear pull to redline, ...must have some nice open roads)

How long has the gear recognition signal been rearing its ugly head? Gives me bad feelings.