Code P2629 ??

Discussion in 'SRT Hellcat Maintenance' started by SRT HC, Aug 10, 2015.

  1. SRT HC

    SRT HC BANNED

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    This morning after a very short burst (saw a police) and backed off quickly, then a few seconds later I threw a code P2629.

    Does anyone know what that means?
    What might the cause be?

    Thanks.
     
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  2. Harley88

    Harley88 Gold Member

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  3. SRT HC

    SRT HC BANNED

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    That doesn't sound good

    Wonder if it's reasonably safe to drive about 10 miles to dealer.
     
  4. Harley88

    Harley88 Gold Member

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    Dealer told me as long as "idiot engine light" is NOT blinking, then safe to drive. Mines in shop as I write this. --
    -Wish n u good luck!
     
  5. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    Isn't someone here tracking all these code Top Cat

    How many miles? Good luck.
     
  6. B5 Blue

    B5 Blue Platinum Member

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    I thought you were:confused:
     
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  7. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    I been a little under the weather. Not doing much of anything lately.:(
     
  8. B5 Blue

    B5 Blue Platinum Member

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    Sorry to hear that, now get back to work Slacker:D
     
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  9. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    Is that anyway to talk to a brother Knob?
     
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  10. SRT HC

    SRT HC BANNED

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    Hellcat has about 2,600 miles.

    Now for some conflicting information:
    Took to dealer. P2629 cleared when I got to the dealer, but CEL was still on. Dealer scanned and told me it was an O2 sensor problem. Safe to drive home. so I made an appointment for next Wednesday to recheck CEL and fix rear door lock (been malfunctioning since I have had car).
    Left dealer and P2629 reappeared when I checked diagnostics again. A very short time later (about 0.5 miles) I rechecked diagnostics and the P2629 had gone away. CEL still on and stayed on until I turned car off in driveway.
     
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  11. SRT HC

    SRT HC BANNED

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    Went to the gym about 5 miles from my house.

    Turned on car: CEL ding and Light stayed on. Diagnostics showed P2629. Drove about 100 yards and Diagnostics show no codes, but CEL still lit.
    After about 45 minutes at gym I returned home. The exact same sequence of events
     
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  12. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    I got a CEL and a code because I turned to the switch to run with the MAF disconnected. Once I drove the car the code cleared but the CEL stayed on. I had the dealer clear the CEL and all has been well every since.
     
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  13. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    From FSM

    P2629-O2 SENSOR 2/1 PUMP CELL CURRENT TRIM CIRCUIT/OPEN

    Theory of Operation

    The wide-band O2 Sensor operates differently than traditional O2 Sensors. The wide-band O2 Sensor tip consists of two cells that provide different functions, a measurement chamber and a detection chamber with pumping capabilities. The oxygen pumping function is the ability to pump oxygen into or out of the measurement chamber depending on the level of oxygen in the measurement chamber. This function provides the wide-band sensing capabilities and is critical for proper oxygen measurement. The O2 Sensor Reference circuit provides a common bias supply to both the O2 Sensor Signal and the O2 Sensor Pump Cell Current circuits.

    During normal operation, the O2 Sensor Reference voltage and O2 Sensor Signal voltage will be a fixed voltage value. The O2 Sensor Current Pump voltage will switch from between 0.45 volts above and below the fixed O2 Sensor Return voltage, allowing current to flow in either direction through the pump. This correlates with the pumping of oxygen into and out of the measurement chamber. On a properly operating vehicle, this happens very quickly and the voltage reading should maintain a steady 0.45 volts when taking a voltage measurement between the O2 Sensor Signal circuit and the O2 Sensor Reference circuit of the O2 Sensor with the engine running and the O2 Sensor operating in closed loop.

    When the exhaust stream has a lean air/fuel ratio (high oxygen content) the pumping element voltage will move toward +0.45 volts pumping oxygen out of the measurement chamber. When the exhaust stream has a rich air/fuel ratio (relatively low oxygen content) the pumping element voltage will move toward -0.45 volts pumping oxygen into the measurement chamber.


    When Monitored and Set Conditions

    When Monitored: This diagnostic runs when the following conditions are met:

    With the ignition on
    The O2 Sensor 2/1 at operating temperature
    The pump cell active

    Set Conditions:

    The Powertrain Control Module (PCM) detects an open on the O2 1/1 Pump Cell Current Trim circuit.

    Default Actions:

    MIL is illuminated on the second consecutive trip that the diagnostic fails.


    Possible Causes
    O2 1/1 PUMP CELL CURRENT TRIM CIRCUIT OPEN OR HIGH RESISTANCE
    O2 SENSOR 2/1
    POWERTRAIN CONTROL MODULE (PCM)
     
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  14. B5 Blue

    B5 Blue Platinum Member

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  15. Gallitos98

    Gallitos98 Active Hellcat Member

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    My car is without the catalistycs and using HP tuner but the P2629 code show up.

    Any reason Why???
     

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