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1995-2002 Range Rover P38A
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Discussion Starter #1
P0171 bank 1 too lean
P0174 bank 2 too lean
P0734 Gear 4 incorrect ratio

My online research says MAF. What say you?
 

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1995-2002 Range Rover P38A
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86 Posts
Discussion Starter #2
Well now I've cleared the codes and the now the incorrect gear ratio is gone but there's a o2 sensor code.
 

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Premium Member
1995-2002 Range Rover P38A
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249 Posts
You could always put a multimeter on the MAF output and see if the voltage is approximately 1.4v at idle, and see if it changes proportionally with a steady change in rpm.
 

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2005 Vogue 4.4
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151 Posts
I could also be an intake ducting, or intake manifold leak.
 

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1995-2002 Range Rover P38A
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86 Posts
Discussion Starter #5
I could also be an intake ducting, or intake manifold leak.
I cleaned everything between the maf and the throttle body and was pretty diligent about seating the seals. But it could be a myriad of other points i suppose.
 

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1995-2002 Range Rover P38A
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212 Posts
P0171 bank 1 too lean
P0174 bank 2 too lean
P0734 Gear 4 incorrect ratio

My online research says MAF. What say you?
Clean your MAF sensor with a MAF sensor cleaner first.
You probably need a temper proof torx bit to remove the sensor from the housing.
 
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