AUDI A4 98 1,8TQ, DTC Error P1136 Bank 1 System too Lean AND P1602 Power Supply (B+) Terminal 30 Low Voltage??

Posted on October 2, 2009 by admin

How should I proced to resolve those two problems without seeing a garage. I can diagnostic the car myself. What is Bank 1? and how should I resolve the 30 Low Voltage issue?
Car : AUDI A4 1,8TQuattro 1998. AEB
If I can have a pointform for diagnostic that will be perfect.
Thank you

it seems as if you may have a power supply problem to your ecu(low voltage term 30) check voltage at terminal 3 at ecu(1mm red wire) should be battery voltage
bank 1 is your lambda probe, could be unmetered air in induction system

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3 Responses to AUDI A4 98 1,8TQ, DTC Error P1136 Bank 1 System too Lean AND P1602 Power Supply (B+) Terminal 30 Low Voltage??

  1. mick says:
    October 2, 2009 at 8:20 pm

    If you cannot work out where is bank one you stand little chance Of a correct diagnosis.
    References :

  2. GRAEME says:
    October 2, 2009 at 8:50 pm

    it seems as if you may have a power supply problem to your ecu(low voltage term 30) check voltage at terminal 3 at ecu(1mm red wire) should be battery voltage
    bank 1 is your lambda probe, could be unmetered air in induction system
    References :

  3. bliden says:
    October 2, 2009 at 9:03 pm

    Change the front O2 sensor, the voltage issue is beyond your scope of expertise. Take the car to an auto electrician and not a auto mechanic to fix that problem. Good luck!!
    References :