2000 V70 XC SE throwing CEL code P1171 and P1174

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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ryball23
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Year and Model: 2000 V70 XC SE
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2000 V70 XC SE throwing CEL code P1171 and P1174

Post by ryball23 »

Greetings,

I had a CEL thrown on my 2000 V70 XC SE and pulled codes P1171 and P1174. I'se seen several different things listed online for those codes. The print out AutoZone gave me states "Fuel Adaption, bank 1" for both codes. I have also seen "cam position sensor" and "rotor sensor" listed for those codes. Which one is it?

It's looking like plugs, injectors, or MAF. Possibly fuel pump? Does that sound right? If it is the MAF, should I clean or just replace? I even saw a thread about someone who had these same two codes that said it was their battery. I also saw someone mention air leakage in the intake system - canister purge (CP) valve, the secondary air solenoid valve and power brake booster? Fuel pump relay?

My concern is that it is only showing for bank 1. That makes me think it is more likely plugs/injectors than the more system wide parts.

I've checked lines, and sprayed carb cleaner around to check for leaks. I haven't found anything. The car is hard to start especially below 1/4 tank but runs fine once started and has never gotten good gas mileage. Any input?

Thanks.

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rspi
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Post by rspi »

The vehicle only has one engine bank. One.
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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rspi
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Post by rspi »

'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

ryball23
Posts: 5
Joined: Mon Feb 26, 2018 3:08 pm
Year and Model: 2000 V70 XC SE
Location: CA

Post by ryball23 »

So I swapped out the MAF and the fuel relay. It wasn't either of those. I have a new fuel pump and filter on the way. I read a bunch of stuff about similar symptoms (cranking strong, but taking a couple of tries to get it to start) pointing to the check valve built into the fuel pump going bad. If that doesn't fix it, then I'm going to check vacuum pressure to the the fuel pressure regulator and possibly the evap system.

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Post by abscate »

You don’t have a vacuum driven fuel pressure regulator on your ME7 controlled car.

Diagnose fuel pump problems with either Vida or a fuel pressure gauge.

Get your vacuum hose diagram on paper, then pull each hose , find the split, replace with New
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