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  1. #41
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    17831/P1423/005155 - Secondary Air Injection System; Bank 1: Insufficient Flow
    Possible Symptoms

    Malfunction Indicator Light (MIL) active

    Possible Causes

    Fuse for Secondary Air Injection Pump blown
    Vacuum Hose(s) leaky or collapsed
    Piping between Secondary Air Injection Pump and Combi (Secondary Air Injection) Valve leaking
    Secondary Air Injection Solenoid(s) faulty
    Combi Valve(s) faulty

    Possible Solutions

    Check Fuse for Secondary Air Injection Pump
    Check Vacuum Hose(s)
    Check Piping between Secondary Air Injection Pump and Combi (Secondary Air Injection) Valve
    Check Secondary Air Injection Solenoid(s)
    Check Combi Valve(s)

    Special Notes

    On vehicles with rivets holding the plastic body halves of the Secondary Air Pump together check to see if the rivets are falling out. If they have fallen out or are loose you may be able to bolt the pump back together if the motor has not failed.
    Last edited by Activ8; 16th March 2019 at 07:09 PM.

  2. #42
    Activ8's Avatar Moderator
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    16891/P0507/001287 - Idle Control System RPM: Higher than Expected.
    Possible Symptoms

    Malfunction Indicator Lamp (MIL) active

    Possible Causes

    Throttle Valve Control Module (J338) dirty/faulty
    Wiring/Connector(s) from/to Throttle Valve Control Module (J338)
    Vacuum Leak

    Possible Solutions

    Check Throttle Valve Control Module (J338)
    Check Wiring/Connector(s) from/to Throttle Valve Control Module (J338)
    Check Intake System for Leaks

    Special Notes

    When found in the NAR 2.0T (BPY) check RVUTB: 01-09-03 or 2018919 for updated Crankcase Breather Valve
    If the breather valve is faulty, full engine vacuum is typically found when removing the oil cap at idle.
    When found in NAR (North American Region) 2011-2013 Jetta, Golf, Passat and New Beetle vehicles with 2.5L engine codes CBTA and CBUA see TSB 01-14-23 -or- TPI 2034012. When applicable, DTCs P050A, P0507 and P0106 are resolved after flash updating the Engine controller.
    Last edited by Activ8; 16th March 2019 at 07:10 PM.

  3. #43
    Activ8's Avatar Moderator
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    16555/P0171/000369 - Fuel Trim; Bank 1: System Too Lean
    Possible Causes

    Mass Air Flow Sensor (G70) defective
    Intake System Leak(s)

    Possible Solutions

    Check Mass Air Flow Sensor (G70)
    Check Fuel Pressure Regulation
    Check Fuel Pump
    Check Injectors
    Check Intake System for Leaks
    Check Exhaust System for Leaks
    Check Secondary Air System for Leaks
    Check Vacuum Pipes for Leaks

    Special Notes

    Fuel Trim Info
    Last edited by Activ8; 16th March 2019 at 07:11 PM.

  4. #44
    Jonnybigballs85's Avatar Unemployed (Platinum)
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    Thanks Rob, Iíll have a sit down and read through it all in bit, I know the secondary air pump works, I tested that through the code reader. I found one of the pipes hanging off of it and thought bingo but itís still the same. Really useful info though mate, thanks.


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  5. #45
    Activ8's Avatar Moderator
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    Quote Originally Posted by Jonnybigballs85 View Post
    Thanks Rob, I’ll have a sit down and read through it all in bit, I know the secondary air pump works, I tested that through the code reader. I found one of the pipes hanging off of it and thought bingo but it’s still the same. Really useful info though mate, thanks.

    Sent from my iPhone using Just T4s
    Its all you can do , just work through them mate.

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