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Thread: No boost, rpms limited with code P2262

  1. #1
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    No boost, rpms limited with code P2262

    Hello!
    I am a fairly new Abarth owner and Im having a huge problem
    While getting on the highway I stepped on the gas and started gaining speed and then out of nowhere I lost boost and couldnt go above around 3500rpm
    I tried sport mode, no sport mode, turning the car off and on, resetting the ECU, waiting overnight. Nothing. No boost at all (not even the 6psi limp mode, boooo) and I cant get the RPMs over 3500. Also, the exhaust is noticeably louder which makes me think some sort of leak? Either way, I realized I was low on oil so I gave it some oil this morning. I drove it today and the check engine light came on and I took it to ORielly to pull the code. The only code was P2262 which only says no turbo boost pressure. As far as I know the car is 100% stock. Its a 2013 Abarth 500c and it only has 69k on the odometer

    Could anyone help me out? I didnt find a whole lot of people having an error with just that code and with a bone stock car. It seems like a lot of the issues I found were with people with upgraded parts around and having to do with the turbo. I havent touched anything down there yet so I dont know where to start.

  2. #2
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    P2262 cel - turbo boost pressure not detected

    Explanation of P2262-00: Turbo Boost Pressure Not Detected - Mechanical

    Theory of Operation
    When the accelerator is closed suddenly, excessive boost pressure can build up between the Turbocharger and the Throttle Body which can cause damage to the Turbocharger. This can occur because the compressed air created by the Turbocharger has no place to go. This results in compressor surge.

    The Powertrain Control Module (PCM) detects this pressure increase via input from the Boost Pressure Sensor. The Boost Pressure Sensor operates as a typical three wire sensor. The PCM provides a 5–volt supply and sensor return circuit to the Boost Pressure Sensor and receives a feedback voltage on the signal circuit. The Turbocharger Surge Valve is responsible for venting the boost pressure between the Turbocharger and Throttle Body during sudden deceleration. The Turbocharger Surge Valve is normally spring loaded closed. When the PCM receives an input signal from the Boost Pressure Sensor that the pressure is above a calibrated amount, the PCM grounds the Turbocharger Surge Valve Control circuit which electrically opens the valve and routes the excess pressure between the Turbocharger and the Throttle Body back to the inlet of the Turbocharger, relieving the pressure and preventing compressor surge.

    • When Monitored:
    With the engine running and the Wastegate Valve is commanded closed or is open at a value less than 100%.

    • Set Condition:
    The difference between the Powertrain Control Module (PCM) (modeled position minus the actual position) is
    greater than 30 kPa (4.35 PSI).


    Possible Causes

    RESTRICTED AIR FILTER
    BOOST SYSTEM PRESSURE HOSES RESTRICTED OR LEAKING
    LARGE INTAKE SYSTEM LEAK OR RESTRICTION
    INTERCOOLER LEAK
    EXHAUST SYSTEM RESTRICTION
    WASTEGATE SOLENOID
    WASTEGATE VALVE STICKING OPEN
    TURBOCHARGER (SEIZED TURBINE)
    2020 DODGE Challenger R/T Scat Pack Widebody
    Pitch Black
    8 Speed ZF
    --.-/ --- MPH - Bone Stock

    "I thought you had a HEMI. Yeah, I had to have a footprint gas pedal installed. So I stole this pile."

    2013 500 ABARTH
    Nero

    2014 SCCA Solo II Texas Region, 2nd G Street
    2015, 2016, 2017, 2018 SCCA Solo II Texas Region, Champion E Prepared

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    Last edited by map; 02-22-2021 at 06:19 PM.

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    Moderator map's Avatar
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    I'd start by locating the exhaust leak.

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    Quote Originally Posted by map View Post
    I'd start by locating the exhaust leak.
    They have lost boost pressure and can't build boost pressure.

    I'd start with the high pressure side of the turbo system:
    Heat Exchanger(s) and Boost Piping
    2020 DODGE Challenger R/T Scat Pack Widebody
    Pitch Black
    8 Speed ZF
    --.-/ --- MPH - Bone Stock

    "I thought you had a HEMI. Yeah, I had to have a footprint gas pedal installed. So I stole this pile."

    2013 500 ABARTH
    Nero

    2014 SCCA Solo II Texas Region, 2nd G Street
    2015, 2016, 2017, 2018 SCCA Solo II Texas Region, Champion E Prepared

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    Senior Member Hermiabarth's Avatar
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    What BigDaddy says: When I blew the hose off my turbo due to a loose fitting clamp to my ATM FMIC, I had similar symptoms - wouldn't rev over 3,500. Fortunately I was close to home and limped back at low speed. I would look at the boost side for an open, broken, loose hose.

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    Thank you all for the suggestions! I tried looking around for any loose hose but wasn’t really able to get my hand anywhere to feel around. I couldn’t visually see anything obvious that popped off but maybe I need to look again with a clearer head. Is there anything I could remove to give me more room in there or is there a better way to find this leak?

  8. #8
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    Quote Originally Posted by Cashman2419 View Post
    Thank you all for the suggestions! I tried looking around for any loose hose but wasn’t really able to get my hand anywhere to feel around. I couldn’t visually see anything obvious that popped off but maybe I need to look again with a clearer head. Is there anything I could remove to give me more room in there or is there a better way to find this leak?
    Use your ears and eyes.

    Start the car up in Neutral... listen and look within the engine bay. Listen for any wind noises, strange noises.
    If you want to visually inspect. You'll need to remove the front bumper and lower splash guard.
    2020 DODGE Challenger R/T Scat Pack Widebody
    Pitch Black
    8 Speed ZF
    --.-/ --- MPH - Bone Stock

    "I thought you had a HEMI. Yeah, I had to have a footprint gas pedal installed. So I stole this pile."

    2013 500 ABARTH
    Nero

    2014 SCCA Solo II Texas Region, 2nd G Street
    2015, 2016, 2017, 2018 SCCA Solo II Texas Region, Champion E Prepared

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