2004 XC70 ETM/ETA Replacement "Reduced Engine Performance" Limp Mode
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    1. #1
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      Question 2004 XC70 ETM/ETA Replacement "Reduced Engine Performance" Limp Mode

      I have a 2004 XC70 that is stuck in limp mode, “Reduced Engine Performance”. This forum has been very helpful, and I have been reading the following threads:


      I have the following ECM codes:
      • ECM 903C - throttle position sensor,
      • ECM 913C - Throttle Unit
      • ECM 9150 - Control Valve Inlet,
      • ECM 9160 - Throttle Unit,
      • ECM 91B7 - throttle Unit


      I think electronic Throttle actuator needs to be replaced, or at least the harness/pins are bad. Any ideas how to get out of limp mode?
      I’ve found the bosh replacement on amazon (https://www.amazon.com/Bosch-Origina.../dp/B00BJJ9OI0).
      Does the 04 XC70 need programming? Read it may require the adaptives for the throttle body be reset. How do I reset the adaptives?

      Here is my plan thus far:
      • Check Fuses
      • Replace Battery
      • Check Wiring Harness
      • Remove ECM check for corrosion
      • Replace ETA/ETM


      Any feedback or guidance would be very helpful, love this car want to keep her running for another 200K.

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    3. #2
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      Quote Originally Posted by stevebay22 View Post
      Any ideas how to get out of limp mode?
      I’ve found the bosh replacement on amazon (https://www.amazon.com/Bosch-Origina.../dp/B00BJJ9OI0).
      Does the 04 XC70 need programming? Read it may require the adaptives for the throttle body be reset. How do I reset the adaptives?
      You generally get out of limp mode by fixing/replacing the ETM (or whatever the real issue is - your codes do suggest the ETM).

      Options for a replacement unit are to send off to Xemodex to rebuild (no programming will be needed), find a JY one or similar from the same engine (any P2 2.5T should work without programming), or get a new one from Volvo (which will need programming). I'd do option 1 or 2 personally. Number 3 is by far the most expensive. Your link does appear to be pre-programmed for a 2.5T if you read the comments/reviews so ought to work.
      2001 V70 Silver - 197k miles
      2006 XC70 Ocean Race - 94K miles
      (Past: '94 944 turbo, sold at ~220k miles)

    4. #3
      Member Antherzoll's Avatar
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      These throttle bodys are plug and play, no programming need. Buy new or a used working unit and it's a direct swap. Just reset perform a hard reset to get the throttle to self adapt, but even then it's unnecessary.

      You can also split it open and have a look at the contacts for contamination/corrosion. Spray it with some electrical contact cleaner if it doesn't look bad. My mechanic also tells me there's a repair kit for the harness as it can become faulty due to contamination/corrosion. Unsure of a part number, but he has said he's done quite a few of them and to watch for it.
      Last edited by Antherzoll; 01-10-2020 at 09:49 PM.
      2005 XC70 Crystal Green | Hilton | 16T | Bad Swede | 145k mi

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    6. #4
      Member Antherzoll's Avatar
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      Quick search. Right from xemodex. Repair for 02-07.

      https://xemodex.ca/ca/product/repair...ttle-body-etb/

      2005 XC70 Crystal Green | Hilton | 16T | Bad Swede | 145k mi

    7. #5
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      FWIW I’ve done the harness repair. It’s an easy job once you figure out how to dis-assemble the connector. That part had me pulling my hair out for a while.


      2002 V70XC, 2003 V40, 2004 S60, 2010 V70
      2010 V70 3.2 125,000miles
      2002 V70XC, 175,000 miles
      2004 S60 2.5T, 160,000 miles

    8. #6
      Junior Member bhill's Avatar
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      Quote Originally Posted by bigtimemcalpine View Post
      FWIW I’ve done the harness repair. It’s an easy job once you figure out how to dis-assemble the connector. That part had me pulling my hair out for a while.

      I think I'm about to get into this, getting reduced engine performance and ECM Codes on the 06 XC70. The TB was recently cleaned as part of PCV service by my indy, so I'm thinking he broke the connection, and now I've got a cable/connector issue.

      Can you share how you dis-assembled the connector, so I can save my hair? ;-)
      His: 2006 V70R T5 AWD, 6MT, Passion Red/Gobi, Premium Audio/Factory Sub, Nav Instagram
      Hers: 2007 V50 T5 AWD, 6MT, Brilliant Blue/Beige, Premium, Climate, Premium Audio
      3rd: 2011.5 XC60 T6 AWD, Saville Grey Metallic/Soft Beige, Climate, BLIS. New engine @87k
      4th: 2006 XC70 ORE T5 AWD, Ocean Race Blue Metallic/Taupe, Climate
      Prev: 1994 850 TURBO Estate, Ruby Red/Black, T5R ECU
      HS/College - 1986 244 DL, Graphite Metallic/Blue Cloth, AW70
      HS - 1981 245 DL, Tan/Brown Vinyl Interior, M46

    9. #7
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      Quote Originally Posted by bhill View Post
      I think I'm about to get into this, getting reduced engine performance and ECM Codes on the 06 XC70. The TB was recently cleaned as part of PCV service by my indy, so I'm thinking he broke the connection, and now I've got a cable/connector issue.

      Can you share how you dis-assembled the connector, so I can save my hair? ;-)
      Hi Bruce,
      It's been a while but here's what I remember.
      - no need for a special tool to take the ECM and TCM out - you just need something long and skinny to slide the locking rods towards front of car. Obviously easier done with the tool but I've now had to do this 2x (take ETM out) and had zero issues without tool.
      - You will need to pull up the entire base of the harness assembly - I don't remember having any issues with that part.
      - You will obviously need to unplug the ETM harness from the ETM. You don't need to remove ETM for this - but it does require some blind work with your arm coming in from the RHS of intake.
      - you will be greatly assisted by buying a tool such as this one for dealing with the connectors
      https://www.amazon.ca/Terminals-Elec...xpY2s9dHJ1ZQ==
      - I seem to recall the rub being a little pink tab shaped like a "U" - it needs to slide out sideways but also needs to be carefully lifted to dislodge the two retained clips. My mind is pretty foggy on the details but that's the only bit that really cause me trouble. I will I could provide more info than that. I think I remember filming this bit and I'll try to remember to look up the footage on my computer when I get home.

      I hope this helps - good luck!
      Pierre
      2010 V70 3.2 125,000miles
      2002 V70XC, 175,000 miles
      2004 S60 2.5T, 160,000 miles

    10. #8
      Junior Member bhill's Avatar
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      Quote Originally Posted by bigtimemcalpine View Post
      Hi Bruce,

      I hope this helps - good luck!
      Pierre
      Thank you! I'll let you know how it goes!
      His: 2006 V70R T5 AWD, 6MT, Passion Red/Gobi, Premium Audio/Factory Sub, Nav Instagram
      Hers: 2007 V50 T5 AWD, 6MT, Brilliant Blue/Beige, Premium, Climate, Premium Audio
      3rd: 2011.5 XC60 T6 AWD, Saville Grey Metallic/Soft Beige, Climate, BLIS. New engine @87k
      4th: 2006 XC70 ORE T5 AWD, Ocean Race Blue Metallic/Taupe, Climate
      Prev: 1994 850 TURBO Estate, Ruby Red/Black, T5R ECU
      HS/College - 1986 244 DL, Graphite Metallic/Blue Cloth, AW70
      HS - 1981 245 DL, Tan/Brown Vinyl Interior, M46

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