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mm milani
mm milani 4/10/2012
2002 Ford E-250 Econoline Base 6Cyl4.2L - Engine
2002 Ford E250 with 4.6L enginecheck engine light stays on and doesn't pass emission
I have a 2002 E250 4.6L ford cargo van. Check engine light stays on when the engine is running. I need to get the emission done. Mechanic hooked up the scanner, it reads the following codes po136 p1131 po171 po174 any advice what they mean and how to fix the problem. Thank you all
4 Answers
  • yboy82
    yboy82 4/10/2012
    P0174 means System too Lean (Bank 2). 0174 code means the PCM has detected an excessive amount of oxygen in the exhaust (lean fuel condition). Bank 2 refers to the side of engine opposite to cylinder number 1.

    Possible Causes:

    Dirty or defective MAF sensor
    Dirty air filter
    Vacuum leak
    Dirty or defective fuel injectors

    Possible Solutions:

    Clean or replace MAF sensor
    Clean or replace dirty air filter
    Replace cracked vacuum hoses
    Clean or replace fuel injectors

    Reply
    1
    yboy82
    mm milani 4/12/2012
    Thank you yboy82
  • yboy82
    yboy82 4/10/2012
    P0131 means O2 Sensor Circuit Low Voltage (Bank I Sensor I). P0131 code means the PCM has detected a low voltage signal longer than the specified time. Bank 1 is connected to cylinder 1 and sensor 1 is located before the catalytic converter.

    Possible Causes:

    Short or high resistance in the O2 sensor circuit or wiring
    Defective O2 sensor

    Possible solutions:

    Repair or replace O2 sensor circuit or wiring
    Replace O2 sensor
    Reply
    0
  • yboy82
    yboy82 4/10/2012
    P0136 means O2 Sensor Circuit Malfunction (Bank 1 Sensor 2). P0136 indicates the PCM has detected a low voltage signal for an extended period of time. Bank 1 is connected to cylinder 1 and sensor 2 is located after the catalytic converter.

    Possible Causes:

    Open or high resistance in the O2 sensor reference circuit
    Exhaust gas leak near O2 sensor
    Defective O2 sensor

    Possible Solutions:

    Repair or replace O2 sensor circuit wiring
    Repair exhaust leak
    Replace O2 sensor

    Reply
    0
  • yboy82
    yboy82 4/10/2012
    P0171 means System too Lean (Bank 1). P0171 indicates that the O2 sensor detects high oxygen level in the exhaust (lean fuel condition). Bank 1 is the side of engine that has cylinder 1.

    Possible Causes:

    Dirty or defective MAF sensor
    Open or short in MAF sensor wiring circuit
    Dirty air filter
    Vacuum leak
    Defective fuel pump
    Clogged fuel filter

    Possible Solutions:

    Clean or replace MAF sensor
    Repair or replace damaged/chaffed wire in the MAF sensor wiring circuit
    Replace damaged or cracked vacuum hoses
    Replace air filter
    Replace fuel filter
    Replace fuel pump

    Reply
    0
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