Today
2008 Range Rover HSE 2008
160k miles
Runs great. Mpg 12-13 in the city
Aug 2014
At 100k miles, after a long drive p0420 catal conv insufficiency came on.. I reset it and returned 2 more times. I eventually put some bg 44 and the code never came back. (had done a throttle body clean, and spark plug change at 90k)
Jan 2020
Replaced radiator
Jan 2020 A week later
p0171 code comes up.
cleared it and 20 min later returned
Here are some #s using the iland tool
LTFT 1 15.6%
LTFT 2 14.%
STFT B1 0.781% sensor 2
STFT B2 0.781% sensor 2
STFT Bank 1 -0.781%
STFT Bak 2 -3.125%
Feb 20 2020
Mass air flow 17.33%
LTFT 1 10.56%
LTFT 2 8.59%
STFT Bank 2 3.906%
STFT Bank 1 7.812%
See graphs below
March 2020
Brought to mechanic who found a vacuum leak on intake hose.
Code returned a weeks later
Another day I had the following codes
calc load value 48.23%
Eng Cool temp 82C
STFTB1 2.125%
LTFTB1 14.84%
STFTB2 0
LTFTB2 10.9%
Fuel Rail pressure 447 Pa
Manifold Abs Pressure sensor 44Pa
Eng Speed 3kph
Veh speed 3kph
mass air flow 7.28%
October 2020
Replaced air filter, oil change.. possibly found a small leak at the egr.
P0721 code erased
Drove rover for 300 mile trip no codes
Next day p0420 came up. I erased it and it hasn’t returned.
November 2020
Had egr replaced and I also replaced the pcv.
Mechanic also changed out the MAF sensor temporily (had a new one in his shop) and he said the values didn’t change so he doesn’t think it is maf.
After the egr and pcv changed, he didn’t reset.. told me to drive vehicle and see if code goes away..
3 weeks later it is still there, but now with highe STFT values as well.
Here are some of the freeze frame data that I have over the last 6 months
######
11/3/20 259pm
11/3/2020 5.28Pm
11/3 542pm
12/13 734am
12/13 7:35a
uel rail pressure
447
450
447
450
447 pa
447
447
447
Manifold absolute pressure sensor
44
72
40
39
29pa
31
31
engine speed
???
1487
700
925
1122
2935
708
709
vehicle speed
3kph
79
1
12
50 kph
0
0
0
stftb2
0
0
-1.562
7.031
5.47%
9.375
14.8
16.4
ltftb2
10.9
10.9
11.719
12.5
11.72%
2.344
21
22.65
calculated load value
48
56
47.843
41.5
15.60%
16.8
28
27.45
engine cooland temp
82
86
80
83
85C
80
86
85
stftb1
2.125
-2.344
-2.344
7.031
3.91%
2.344
17.9
17.9
ltftb1
14.84
13.281
14.844
17.188
14.84%
14.844
21.09
22.656
intake air temp
29
23
26C
31
22
24
commanded exhaust gas circulation
0
3.14%
0
0
time sionce engine started
804
249
964
50
131
absolute throttle position
14.51
16.078
14.12%
18.431
13.3
13.3
mass air flow
6.85
9.68g/s
5.58 g/s
19.16
4.21
4.14
Commanded evaporative purge
47.451
29.80%
47.45
exhaust gas circulation
0
99.22%
0
0
absolute load value
22.353
23.922
11.37%
14.902
13.3
control moduloe voltage
13.73
13.925
13.75V
13.73
1.8
Barometric pressure
102
102
101Pa
102
103
fuel level input
21.91
10.95
45.88%
37.6
86
Ambient air temp
23
11
13C
14
11C
relative throtle position
3.137
4.314
2.75%
7.059
1.569
Commanded equivalence ratio
1.003
0.992
1.007
0.974
Accelerator pedal position sensor circuit E
13.725
30.5
23.50%
29.4
13.725
Accelerator pedal position sensor circuit D
13.725
30.5
23.14%
29.4
13.725
absolute throottle position B
31.765
32.5
30.98
34.9
30.58
commanded throttle actuator control
23.9
22.35%
27.451
19.608
######
11/3/20 259pm
11/3/2020 5.28Pm
11/3 542pm
12/13 734am
Went to mechanic yesterday and he scanned it.
Doesn’t think that this is an air intake problem…
Although the fuel trims do decrease with increase RPMS. For some reason, he doesn’t think this is it…
Suggests that he looks at the fuel pressure and performs some tests with gages.
I have no misfires.. and car runs great…. Only thing is two days ago while driving on highway at 45 mph or so the vehicle shut off (rpm to zero) and I had to stop.. I restarted and vehicle drove great….
I have no problem spending money to fix theproblem, but im trying to not throw parts.
I figured at 12 yrs and 160k I can replace the fuel filter next..
Any thoughts on what this can be? Or can not be?
Should I reflash the ECU? Is there an update for the ECU? If yes, can I do this with an iland tool? Or do I need to go to dealership?
Any other measures I can look at to figure this out? Any particular measures that relate to the fuel system I can evaluate with the iland tool to help me rule in or rule out?
I have not cleaned fuel injectors (one of the suggestions). My mechanic doesn’t seem too inclined to do this.
I recently also have the following code p0128-00.. I replaced the hose that goes to thermostat and radiator over 10 months ago, but haven’t replaced the thermostat… any recommendations on this code?
Thank you for your help and guidance.
Gus
2008 Range Rover HSE 2008
160k miles
Runs great. Mpg 12-13 in the city
Aug 2014
At 100k miles, after a long drive p0420 catal conv insufficiency came on.. I reset it and returned 2 more times. I eventually put some bg 44 and the code never came back. (had done a throttle body clean, and spark plug change at 90k)
Jan 2020
Replaced radiator
Jan 2020 A week later
p0171 code comes up.
cleared it and 20 min later returned
Here are some #s using the iland tool
LTFT 1 15.6%
LTFT 2 14.%
STFT B1 0.781% sensor 2
STFT B2 0.781% sensor 2
STFT Bank 1 -0.781%
STFT Bak 2 -3.125%
Feb 20 2020
Mass air flow 17.33%
LTFT 1 10.56%
LTFT 2 8.59%
STFT Bank 2 3.906%
STFT Bank 1 7.812%
See graphs below
March 2020
Brought to mechanic who found a vacuum leak on intake hose.
Code returned a weeks later
Another day I had the following codes
calc load value 48.23%
Eng Cool temp 82C
STFTB1 2.125%
LTFTB1 14.84%
STFTB2 0
LTFTB2 10.9%
Fuel Rail pressure 447 Pa
Manifold Abs Pressure sensor 44Pa
Eng Speed 3kph
Veh speed 3kph
mass air flow 7.28%
October 2020
Replaced air filter, oil change.. possibly found a small leak at the egr.
P0721 code erased
Drove rover for 300 mile trip no codes
Next day p0420 came up. I erased it and it hasn’t returned.
November 2020
Had egr replaced and I also replaced the pcv.
Mechanic also changed out the MAF sensor temporily (had a new one in his shop) and he said the values didn’t change so he doesn’t think it is maf.
After the egr and pcv changed, he didn’t reset.. told me to drive vehicle and see if code goes away..
3 weeks later it is still there, but now with highe STFT values as well.
Here are some of the freeze frame data that I have over the last 6 months
######
11/3/20 259pm
11/3/2020 5.28Pm
11/3 542pm
12/13 734am
12/13 7:35a
uel rail pressure
447
450
447
450
447 pa
447
447
447
Manifold absolute pressure sensor
44
72
40
39
29pa
31
31
engine speed
???
1487
700
925
1122
2935
708
709
vehicle speed
3kph
79
1
12
50 kph
0
0
0
stftb2
0
0
-1.562
7.031
5.47%
9.375
14.8
16.4
ltftb2
10.9
10.9
11.719
12.5
11.72%
2.344
21
22.65
calculated load value
48
56
47.843
41.5
15.60%
16.8
28
27.45
engine cooland temp
82
86
80
83
85C
80
86
85
stftb1
2.125
-2.344
-2.344
7.031
3.91%
2.344
17.9
17.9
ltftb1
14.84
13.281
14.844
17.188
14.84%
14.844
21.09
22.656
intake air temp
29
23
26C
31
22
24
commanded exhaust gas circulation
0
3.14%
0
0
time sionce engine started
804
249
964
50
131
absolute throttle position
14.51
16.078
14.12%
18.431
13.3
13.3
mass air flow
6.85
9.68g/s
5.58 g/s
19.16
4.21
4.14
Commanded evaporative purge
47.451
29.80%
47.45
exhaust gas circulation
0
99.22%
0
0
absolute load value
22.353
23.922
11.37%
14.902
13.3
control moduloe voltage
13.73
13.925
13.75V
13.73
1.8
Barometric pressure
102
102
101Pa
102
103
fuel level input
21.91
10.95
45.88%
37.6
86
Ambient air temp
23
11
13C
14
11C
relative throtle position
3.137
4.314
2.75%
7.059
1.569
Commanded equivalence ratio
1.003
0.992
1.007
0.974
Accelerator pedal position sensor circuit E
13.725
30.5
23.50%
29.4
13.725
Accelerator pedal position sensor circuit D
13.725
30.5
23.14%
29.4
13.725
absolute throottle position B
31.765
32.5
30.98
34.9
30.58
commanded throttle actuator control
23.9
22.35%
27.451
19.608
######
11/3/20 259pm
11/3/2020 5.28Pm
11/3 542pm
12/13 734am
Went to mechanic yesterday and he scanned it.
Doesn’t think that this is an air intake problem…
Although the fuel trims do decrease with increase RPMS. For some reason, he doesn’t think this is it…
Suggests that he looks at the fuel pressure and performs some tests with gages.
I have no misfires.. and car runs great…. Only thing is two days ago while driving on highway at 45 mph or so the vehicle shut off (rpm to zero) and I had to stop.. I restarted and vehicle drove great….
I have no problem spending money to fix theproblem, but im trying to not throw parts.
I figured at 12 yrs and 160k I can replace the fuel filter next..
Any thoughts on what this can be? Or can not be?
Should I reflash the ECU? Is there an update for the ECU? If yes, can I do this with an iland tool? Or do I need to go to dealership?
Any other measures I can look at to figure this out? Any particular measures that relate to the fuel system I can evaluate with the iland tool to help me rule in or rule out?
I have not cleaned fuel injectors (one of the suggestions). My mechanic doesn’t seem too inclined to do this.
I recently also have the following code p0128-00.. I replaced the hose that goes to thermostat and radiator over 10 months ago, but haven’t replaced the thermostat… any recommendations on this code?
Thank you for your help and guidance.
Gus
