2003-2008 Honda Accord Diesel I-CTDI MAP (Mass Air Pressure) Sensor Clean

Chassis codes: CN1 and CN2, Engine codes: N22A1

  1. Accord_N22
    Difficulty Level:
     
    Basic
    2003-2008 Honda Accord Diesel I-CTDI MAP (Mass Air Pressure) Sensor Clean

    As there are no DIY guides for cleaning the MAP and MAF sensors on the I-CTDI engines I thought it would be a good opportunity for my second and third DIY guides.

    I have created separate guides for MAP and MAF sensor

    I have just performed it on my own car and it is relatively a straight forward task

    Click here to find the guide on how to clean the MAF sensor
    2003-2008 Honda Accord Diesel I-CTDI MAF (Mass Air Flow) Sensor Clean
    -----------------------------------------------------------------------------------------------------------
    Objective
    To clean the MAP sensor on the 2.2 I-CTDI Diesel Engines

    See below a diagram of where the MAP sensor is located in the I-CTDI engine bay
    (engine insulator cover is removed)

    1.JPG


    -----------------------------------------------------------------------------------------------------------
    DIY Guide Compatibility
    For:
    -Honda Accord Tourer Estate 2003-2008 (diesel models)
    -Honda Accord Saloon 2003-2008 (diesel models)
    Chassis codes: CN1 and CN2
    Engine codes: N22A1

    ------------------------------------------------------------------------------------------------------------
    Disclaimer
    I won't take any responsibility for and damage or injury. You follow this guide at your own risk.
    If you do not agree, please do not follow this guide.
    This DIY has been written and intended only as a guide.
    There may be other or easier ways of performing a stage.
    ALWAYS disconnect the battery when working with anything electrical on your car
    ALWAYS wear gloves when handling cleaning solutions (it can irritate skin)
    TAKE EXTRA CARE WHEN HANDLING THESE SENSORS – THEY ARE FRAGILE!!!!!

    ------------------------------------------------------------------------------------------------------------
    Background
    Whilst I had EGR issues I also had slight hesitation upon acceleration.
    Some advice from members was to check both the MAF and MAP sensors and to ensure they are clean
    The procedure is relatively straight forward so I decided to give it a go.
    When both the MAP and MAF sensors were clean the engine response improved noticeably.

    -----------------------------------------------------------------------------------------------------------
    Equipment Required
    To get started here is a list of some of the tools you may require

    -CRC Air Sensor Clean Spray
    -Metric sockets: 10mm
    -Socket Extension
    -Small Ratchet (1/4 inch)

    Link to buy CRC Air Sensor Clean Spray


    2.


    NOTE: DO NOT USE ANY OTHER CLEANING SPRAY FOR THESE SENSORS,
    OTHER CLEANING AGENTS LIKE BRAKE CLEANER ARE TOO AGGRESSIVE AND WILL DAMAGE THE SENSORS/COMPONENTS.
    YOU HAVE BEEN WARNED!!!!!

    ------------------------------------------------------------------------------------------------------------

    Parts Required

    No parts are required however if they are faulty then you would need to replace them.
    Usually if they are faulty a MIL (malfunction indicator lamp) will illuminate or you will get a fault code once you plug in an OBD reader.

    MAP Sensor (Mass Air Pressure)

    Unfortunately the MAP sensor is no longer available from Honda (discontinued)
    However you can find the part on other websites by referring to the Bosch part number

    Genuine Honda Part Number

    Item 8 37830RBDE01 SENSOR ASSY, MAP & TA

    Bosch Part Number

    0 281 002 680

    3.


    Places to buy a replacement MAP Sensor

    -Ebay (2nd Hand) Electronics, Cars, Fashion, Collectibles, Coupons and More | eBay
    -Amazon Listed here for £73.29 delivered



    Typical prices for the part are approx £73.29 from Amazon (as of 27-03-16)
    Or approx £20-£40 from a second hand source (however there is a risk the sensor could be faulty when buying second hand)

    ---------------------------------------------------------------------------------------------------------
    The Procedure

    Step 1

    Ensure the car is parked with the ignition off and the handbrake up.
    Pop open the engine hood and prop it up with the stand

    Step 2

    Using your 10mm socket wrench, disconnect the negative battery terminal.
    Place aside and away from the terminal.
    (ALWAYS DISCCONECT THE BATTERY WHEN WORKING ON ANY ELECTRICALS)

    4.

    Step 3

    Using the 10mm socket wrench with an extension loosen and remove all 4 bolts and washers that hold the engine insulation cover.
    Keep all the bolts and washers safe. These can easily fall into the engine bay.

    5.

    Step 4

    To begin removing the MAP sensor (located on top of the throttle body)
    Carefully unplug the sensor’s connector.

    5A.

    Step 5

    Using the 10mm socket wrench unscrew the single 10mm bolt that secures the sensor in place

    6.

    Step 6

    Once the 10mm bolt is removed, gently wiggle the sensor out.
    Be very careful here.
    Once removed the MAP sensor looks like this

    7.

    Step 7

    To clean the sensor, spray CRC air sensor cleaner generously on the component that looks like an inline fuse. (yellow/orange bulge).

    Also spray along the metal wire.

    Hold the sensor so the cone is facing down, this will allow all the fluids to drain away.

    DO NOT TOUCH THE YELLOW/ORANGE COMPONENT and do not let the straw of the CRC cleaner spray touch it either.

    8.

    Step 8

    Once all three areas are clean, do not re-fit.
    Leave to completely dry out.

    Step 9

    Once the MAF sensor is completely dried, line the green rubber o ring seal with some engine oil.
    Smear some oil from the dipstick to line the oring.
    Make sure the oil doesn't drip onto the yellow/orange component
    Place it back into its original position and repeat the removal process in reverse order.

    9.
    (READ NOTES BELOW BEFORE CONTINUING)

    Notes

    -There are no specified torque settings for the MAP screws so tighten it accordingly.
    -Once everything is re-installed, refit the negative terminal to the battery

    (ENSURE YOUR KEYS ARE NOT IN THE IGNITION WHEN THE TERMINAL IS RE-FITTED)

    -Start the engine and let it idle for approx 5 mins (ECU relearns all air pressure and flow readings), after 5 mins turn the ignition off and then re-start and let is idle for another couple mins.

    (Note: There may be other ECU reset procedures, use the procedure your most familiar with)
    Double check all the bolts for engine insulator cover are tight

    Take the car on a test drive and ensure no fault lights are illuminated

    Accord_n22
    27-03-2016
    Version: 1.0

    --------------------------- END OF PROCEDURE ---------------------------
    wahabishtiaq and Ichiban like this.

Recent Reviews

  1. Nighthawk
    Nighthawk
    5/5,
    Good work mate - I am going to be doing both of mine next week with her service.
    1. Accord_N22
      Author's Response
      Thanks nighthawk, definitely worth doing as its such a simple job to do :)
  2. wahabishtiaq
    wahabishtiaq
    4/5,
    good work
    1. Accord_N22
      Author's Response
      Thanks muhammad :)
  3. Nels
    Nels
    5/5,
    Looks like you're on a roll. Another smashing guide.
    1. Accord_N22
      Author's Response
      Thanks nels, on fire at the moment :)
  4. SpeedyGee
    SpeedyGee
    5/5,
    Another top guide @Accord_N22
    1. Accord_N22
      Author's Response
      Thanks speedygee :)