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cam solenoid and P0171 Bank 1 Lean

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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IslandV70
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cam solenoid and P0171 Bank 1 Lean

Post by IslandV70 » Tue Mar 12, 2019 9:00 am

My car has been getting Cam Solenoid errors since I got it and also gets P0171. I took the solenoid off and cleaned it with Seafoam and an air gun with no changes :(
So I assume the thing is beat and will order another one today. They are easy enough to replace. Does the cam error cause the lean running error or do I have yet another thing to track down?



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RickHaleParker
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Re: cam solenoid and P0171 Bank 1 Lean

Post by RickHaleParker » Tue Mar 12, 2019 9:20 am

Most likely you have another problem to track down.

P0171 = ECM-250A Long-term fuel trim.

Diagnostic trouble code (DTC) information ECM-250A

Condition
The engine control module (ECM) receives information from the heated oxygen sensor (HO2S) about the fuel/air mixture at different loads. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the fuel/air mixture deviates too much from target lambda value, leaving the long-term trim in one of its limit positions.

Substitute value
None.

Possible source
Upper limit:
  • Damaged/Dirty mass air flow (MAF) sensor
    Low fuel pressure
    Air leakage.
Lower limit:
  • Damaged/Dirty mass air flow (MAF) sensor
    High fuel pressure
    Leaking injectors
    Leaking evaporative emission system (EVAP)
    Contaminated engine oil
    Oil level too high.
Fault symptoms
  • Malfunction indicator lamp (MIL) lit
    Poor performance
    May result in high fuel consumption.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

IslandV70
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Re: cam solenoid and P0171 Bank 1 Lean

Post by IslandV70 » Tue Mar 12, 2019 9:46 am

Looks like I might start with a MAF clean.



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RickHaleParker
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Re: cam solenoid and P0171 Bank 1 Lean

Post by RickHaleParker » Tue Mar 12, 2019 9:48 am

IslandV70 wrote:
Tue Mar 12, 2019 9:46 am
Looks like I might start with a MAF clean.
Might as well. The MAF should be cleaned periodicity and it does not take much time.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

chris11211
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Re: cam solenoid and P0171 Bank 1 Lean

Post by chris11211 » Tue Mar 12, 2019 8:21 pm

You night just have to dig in and clean the throttle body as well; as it gives off the lean fuel trim codes too.



IslandV70
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Re: cam solenoid and P0171 Bank 1 Lean

Post by IslandV70 » Wed Mar 13, 2019 6:02 pm

Funky star bits on the way.



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RickHaleParker
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Re: cam solenoid and P0171 Bank 1 Lean

Post by RickHaleParker » Wed Mar 13, 2019 6:27 pm

IslandV70 wrote:
Wed Mar 13, 2019 6:02 pm
Funky star bits on the way.
Security Torx Bits.

A lot A lot of times you can turn the Security Torx bolt with the right sized flat-head screwdriver. You wedge the flat-head screwdriver along the post and the ends of the blade into two of the points of the star then twist.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

EngineeringBloke
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EngineeringBloke

Re: cam solenoid and P0171 Bank 1 Lean

Post by EngineeringBloke » Thu Mar 14, 2019 8:58 am

Or grip the edge of the screw with a pair of pliers and twist! I used this myself.



IslandV70
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IslandV70

Re: cam solenoid and P0171 Bank 1 Lean

Post by IslandV70 » Thu Mar 14, 2019 9:00 am

I already paid $10 for the security bits, so I'll just use them, but thanks for the ideas.



IslandV70
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Re: cam solenoid and P0171 Bank 1 Lean

Post by IslandV70 » Fri Apr 05, 2019 1:35 pm

Turns out my MAF is held in by screws, so no funky bits needed. Cleaning it was easy but it also did not change a thing :(



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