Check engine light

Discussion in '94-95 5.0 - Specific' started by Demolisher, Apr 5, 2007.

  1. Demolisher

    Demolisher Active Member

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    Ok well my was on so i hooked up the computer to it and it came up wit these 172-EGO NOT SWITCHING 176-EGO NOT SWITCHING 556-Fuel pump relay primary CKT 628-Excessive converter Clutch slippage :help2: How do i fix all this or wut ? how do i figure out the problem i just want my engine light off so then i can try to turn off my ABS one off also lol plz help guys :drunk:
     
  2. Demolisher

    Demolisher Active Member

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    ttt
     
  3. SvtBlack95

    SvtBlack95 Well-Known Member

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    i know 172 is your o2 sensor bank 1 ......replace your o2 sensor on the passenger side
     
  4. Demolisher

    Demolisher Active Member

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    thanx i just need 3 more codes lol :dancing6:
     
  5. 70351cmustang

    70351cmustang New Member

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    Found this for your fuel code and o2 sensor codes
    Diagnostic Trouble Code (DTC) 543/524 indicates a fuel pump secondary circuit failure between the B(+) supply and the FPM connection to the power-to-pump circuit.

    Possible causes:
    No Starts:

    -- Open circuit between the B(+) supply and the FPM connection to the power-to-pump circuit.

    -- Fuel pump relay contacts always open.

    Engine Starts:

    -- Left/Front HO2S short to power

    -- Damaged Powertrain Control Module (PCM).

    ** Does engine start?

    NO = fix open in circuit or replace CCRM. RERUN test.
    YES = continue

    CHECK FRONT/LEFT HO2S FOR SHORT TO POWER

    NOTE:
    Due to the internal circuitry of the PCM, a Left/Front HO2S signal short to power could produce a DTC 542/543.

    * Key off.

    * Disconnect left or front HO2S.

    * Measure resistance between HO2S signal pin and KEY POWER pin at the HO2S connector.

    ** Is resistance greater than 10,000 ohms?


    NO = replace the O2 sensor. RERUN test.
    YES = continue

    CHECK HO2S CIRCUIT FOR SHORT TO POWER

    * Key off.

    * Left or Front HO2S disconnected.

    * Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary. Leave PCM disconnected.

    * Key on.

    * Measure voltage between the HO2S signal at the HO2S vehicle harness connector and chassis ground.

    ** Is voltage less than 1.0 volt?


    YES = replace ECM, reconnect the O2. RERUN test.
    NO = fix short circuit, reconnect the ECM and O2. RERUN test.
    END


    ********************************

    Continous memory 543

    ** Also a continous memory code 556/557?

    YES = skip ahead to section after next YES/NO quesions
    NO = continue

    A Continuous Memory DTC 524/543, without the presence of a Continuous Memory DTC 556/557, indicates that during vehicle operation, one of the following has occurred :

    -- Open in the B(+) circuit between B(+) and the fuel pump relay.

    -- Fuel pump relay contacts opened.

    -- Open in the power-to-pump circuit from the CCRM/LFP relay to the FPM splice.

    -- Left/Front HO2S circuit short to power.


    * Start engine.

    * Check for engine stall/stumble while performing the following (also, if possible, listen for fuel pump turning off):

    -- Shake, wiggle, bend the fuel pump relay B(+) circuit to the CCRM/LFP relay.

    -- Lightly tap the CCRM/LFP relay (to simulate road shock).

    -- Shake, wiggle, bend the power-to-pump circuit from the CCRM/LFP relay to the FPM splice.

    * Key off.

    * Inspect the CCRM/LFP relay connector and B(+) connector terminal for corrosion, damaged pins, etc.

    ** Is fault indicated/found?

    YES = ISOLATE fault and SERVICE as necessary. CLEAR Continuous Memory DTC. RERUN test.
    NO = Under certain conditions, a Continuous Memory DTC 524/543 may have been set without a Continuous Memory DTC 556/557, even though a fault has occurred in the fuel pump primary circuit. continue

    A Continuous Memory DTC 556/557 indicates a fuel pump primary circuit failure has occurred during vehicle operation. Possible causes are:

    -- Open VPWR in the CCRM.

    -- Open coil in fuel pump relay.

    -- Open in fuel pump circuit (PCM Pin 22).

    * Start engine.

    * Check for engine stall/stumble while performing the following (also, if possible, listen for fuel pump turning off):

    -- Shake, wiggle, bend the EEC-IV vehicle harness fuel pump circuit (Pin 22) between the PCM and the CCRM.

    -- Lightly tap the CCRM to simulate road shock.

    * Key off.

    * Inspect the PCM connector and the fuel pump relay connectors for corrosion, damaged pins, etc.

    ** Is fault indicated/found?

    YES = ISOLATE fault and SERVICE as necessary. CLEAR Continuous Memory DTC. RERUN test.
    NO = continue

    CHECK LEFT/FRONT HO2S CIRCUIT FOR SHORT TO POWER

    NOTE:
    Due to the internal circuitry of the PCM, an intermittent left/front HO2S signal short to power could produce a Continuous Memory DTC 542 or 524/543.

    * Key off.

    * Install breakout box, if applicable.

    * Breakout box installed, PCM disconnected.

    * Connect a test lamp between the left/front HO2S test (pin 43) and test pin 40 at the breakout box.

    * Key on, engine off.

    * Observe test lamp for an indication of a fault while performing the following (the light will turn on bright when a fault is detected):

    -- Shake, wiggle, bend the left/front HO2S circuit from the HO2S sensor to the PCM.

    -- Lightly tap the HO2S sensor (to simulate road shock).

    ** Is fault indicated?

    YES = ISOLATE fault and SERVICE as necessary. CLEAR Continuous Memory DTC. RERUN test.
    NO = take to dealer for complicated analysis (sorry)
    HOPE THIS HELPS :thumb: :pimp2: :thumb: