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Author Topic: Fault Codes  (Read 3880 times)

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Sir Popple

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Fault Codes
« on: 27 November 2010, 11:30:34 »
Hi, i hope someone can help, i have changed the oil inter-cooler, rocker cover gaskets and thermostat on my MV6 2000yr, and now the car will not start. I have checked around to make sure all is connected as it should be to find that the fuel pump is not running up. Having done the paper clip test i get the following fault codes 21, 48, 57, 49, 31, 73, 94. do i now have a faulty crank sensor? or is it something else? 
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Welung666

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Re: Fault Codes
« Reply #1 on: 27 November 2010, 13:11:22 »
21   Throttle Position Sensor (TPS) Voltage High
48   Battery Voltage Low
57   Idle Air Control Voltage Low
49   Battery Voltage High
31   No Engine RPM Signal (IGNORE THIS ONE)
73   Mass Air Flow Sensor Voltage Low
94   Hall Sensor Voltage High

Double check all the plugs are in fully and in the right holes.
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vauxfan2k

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Re: Fault Codes
« Reply #2 on: 27 November 2010, 13:28:55 »
how can the battery voltage be low and high? doesnt make sense  ;D
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Sir Popple

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Re: Fault Codes
« Reply #3 on: 27 November 2010, 14:11:19 »
Thx i will double check, though before i did the job the car cut out on the wife and would not restart, but after 5mins or so it fired. ?
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Sir Popple

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Re: Fault Codes
« Reply #4 on: 27 November 2010, 14:31:48 »
Well all plugs seem to be in the correct place and pushed together...

I wish to eliminate the fuel pump by checking for a feed there are 4 wires going to the plug in the boot, 2 Brown 1 Red Blue and 1 Blue Black and ideas which are the fuel pump feed wires?

Thanks
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Welung666

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Re: Fault Codes
« Reply #5 on: 27 November 2010, 15:19:57 »
As you look down the wires towards the plug it's the left 2. The right 2 are for the fuel gauge.

Before you do that attach a jump lead from a solid metal point on the engine and the other to the -ve on the battery and try it. It seems to me that it's not grounding properly.
« Last Edit: 27 November 2010, 15:20:23 by Welung666 »
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Sir Popple

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Re: Fault Codes
« Reply #6 on: 27 November 2010, 15:30:38 »
Sorry i am struggling to understand, i am getting +12v on the on the blue black and an earth on the brown next to it when i turn the ign on?
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Welung666

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Re: Fault Codes
« Reply #7 on: 27 November 2010, 15:36:28 »
IIRC the fuel pump +ve is red/blue.
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Sir Popple

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Re: Fault Codes
« Reply #8 on: 27 November 2010, 15:50:22 »
Thx Welung, I do not have any voltage on the red/blue when i turn the ignition on?
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Welung666

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Re: Fault Codes
« Reply #9 on: 27 November 2010, 15:54:52 »
Quote
Thx Welung, I do not have any voltage on the red/blue when i turn the ignition on?

You won't. The fuel pump is only live when a) the engine is cranking and b) the crank sensor detects that the engine is turning.

Have you tried the jump lead?
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Sir Popple

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Re: Fault Codes
« Reply #10 on: 27 November 2010, 16:05:36 »
yes, still no joy!!!!!
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Welung666

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Re: Fault Codes
« Reply #11 on: 27 November 2010, 16:07:12 »
Shame you're not still in Cannock :(
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Sir Popple

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Re: Fault Codes
« Reply #12 on: 27 November 2010, 16:08:33 »
Just going to grab the wife to crank the engine to see if i get 12v on the red/blue
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Sir Popple

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Re: Fault Codes
« Reply #13 on: 27 November 2010, 16:09:29 »
I would come home tomorrow, fancy a house in Ireland
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Sir Popple

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Re: Fault Codes
« Reply #14 on: 27 November 2010, 16:14:21 »
Ok, I am getting 0.38V+ on the red/blue when i crank the engine is this correct?
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