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01 Volvo V70XC CEL Help

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

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

Arowe84
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Year and Model: 2001 Volvo V70XC
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Arowe84

01 Volvo V70XC CEL Help

Post by Arowe84 » Mon Mar 02, 2020 4:10 pm

Hi everyone,

First post on here. Just got the CEL on with the following codes P0236&P0237. The code reader says it is the turbocharger boost sensor A circuit. From what I can tell from the forums maybe it is a failed or dirty MAP sensor? From my forum searching I’m having trouble locating it. I guess it’s in a different spot on the 01 vs the 02 and beyond. Anyway if anyone can guide me in finding and fixing this CEL I’d really appreciate it. The car is otherwise drivable and seems to be running well. Thank you.

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RickHaleParker
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Re: 01 Volvo V70XC CEL Help

Post by RickHaleParker » Mon Mar 02, 2020 7:03 pm

The boost sensor will be someplace in the charged air. Follow the charged air from the turbo to the Manifold. It should be on the cold side of the Intercooler or the pipe to the manifold.

You can ignore P0236 for now P0237 will trip a P0236 also.

Boost sensor:
  • 1. Check and clean connector.
    2. Check wiring for shorts and opens.
    3. Pull the ECM and clean the connectors.
    . (Make sure you get ECM full seated and the locks all the way, when you put it back in)
    4. Replace Boost sensor.
ECM-1600 (P0237) Boost pressure sensor. Signal too low, too high or Intermittent.

Diagnostic trouble code (DTC) information

Condition
If the control module receives a signal from the boost pressure sensor which is lower than 0.2 V (low signal) or higher than 4.85 V (high signal) it is interpreted as a fault and ECM-1600 is stored.

Substitute value
Boost pressure control runs in an open-loop, in other words set duty cycles are generated regardless of boost pressure.

Possible source
Signal too high:
  • contact resistance in terminals
    short-circuit to supply voltage in the signal cable
    open-circuit in signal cable
    defective boost pressure sensor
Signal too low:
  • short-circuit to ground in the signal cable
    defective boost pressure sensor
Fault symptoms
none
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll 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.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

Arowe84
Posts: 2
Joined: Mon Mar 02, 2020 4:04 pm
Year and Model: 2001 Volvo V70XC
Location: California
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Arowe84

Re: 01 Volvo V70XC CEL Help

Post by Arowe84 » Mon Mar 09, 2020 1:36 pm

Update: replaced MAP sensor with a $10 ebay replacement. Solved problem. Check engine light is now off.

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