Question about 1989 Buick Regal

1 Answer

Car keeps dying

My car recently started dying all the time, now you can't hardly go down the road without it dying. You can restart it, but it is getting harder and harder and more often. We changed the fuel filter and map sensor, but this hasn't helped. What does code 34 mean, too? What do we do?

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  • newfoals29 Apr 11, 2009

    I have a 1989 Lincoln Towncar with the same dying issue. In addition, now it appears I've something wrong with the overdrive gear of the transmission. When I try to put it in overdrive, the engine just races. Its now starting to do this more frequently, and is beginning to affect regular drive too. I was told the "code" indicated a TPS problem. Could this also be affecting the transmission issue? When you try to warm it up, the engine will race, then let off, then race, finally dying. Are all these problems related to the TPS issue?

    Thanks!

    Cheryl Scott

  • chickyNoClue Apr 27, 2009

    same kind of prob. we have bought:

    two alts,a battery,a new starter, new fuel pump and filter

    nothing has helped

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  • 42 Answers

Trouble Code 33 and 34 are the MAF/MAP Sensor Circuit. It sounds like you've replaced that sensor already. Did you also have the code 34 before putting in the new sensor?
Or did this code start after it's replacement? Any other codes appearing?

Troubleshooting it would depend if it has the Speed Density Update. The dealer should be able to provide that info.

Here's your fault code list:

13 oxygen sensor circuit 14 coolant temp sensor circuit (high temp) 15 coolant temp sensor circuit (low temp) 21 throttle position sensor (TPS) circuit (high signal) 22 throttle position sensor (TPS) circuit (low signal) 23 manifold air temp (MAT) circuit (low temp) 24 vehicle speed sensor (VSS) circuit 25 manifold air temp (MAT) circuit (high signal) 31 wastegate solenoid electrical circuit 32 exhaust gas recirculation (EGR) circuit 33 mass air flow (MAF) circuit (gm/sec high) 34 mass air flow (MAF) circuit (gm/sec low) 41 cam sensor circuit 42 C3I EST or bypass circuit failure 43 electronic spark control (ESC) circuit 44 oxygen sensor circuit (lean exhaust) 45 oxygen sensor circuit (rich exhaust) 51 PROM error 52 calpak error 55 ECM error

Posted on Oct 25, 2008

  • 1 more comment 
  • jetwash
    jetwash Oct 25, 2008

    reformatted error code list:



    13

    oxygen sensor circuit





    14

    coolant temp sensor circuit (high temp)

    15

    coolant temp sensor circuit (low temp)





    21

    throttle position sensor (TPS) circuit (high signal)

    22

    throttle position sensor (TPS) circuit (low signal)





    23

    manifold air temp (MAT) circuit (low temp)

    24

    vehicle speed sensor (VSS) circuit





    25

    manifold air temp (MAT) circuit (high signal)





    31

    wastegate solenoid electrical circuit





    32

    exhaust gas recirculation (EGR) circuit





    33

    mass air flow (MAF) circuit (gm/sec high)





    34

    mass air flow (MAF) circuit (gm/sec low)





    41

    cam sensor circuit





    42

    C3I EST or bypass circuit failure





    43

    electronic spark control (ESC) circuit





    44

    oxygen sensor circuit (lean exhaust)





    45

    oxygen sensor circuit (rich exhaust)

    51

    PROM error





    52

    calpak error





    55

    ECM error



  • jetwash
    jetwash Oct 25, 2008

    You may want to check your fuel pressure with a gauge.




    or do a simple Fuel pump test:



    1. remove the gas cap.


    2. have one person listen in the gas tank at the gas cap opening.


    3. the other person turns the ignition switch to the ON position
      ONLY (so the dash lights come on.) Do NOT crank or start up the engine.


    4. As soon as the ignition key is turned to the ON position, The person
      at the gas tank should hear the fuel pump run for TWO SECONDS and then
      it should STOP.






    If it does NOT run for the 2 seconds every time, the fault is either the fuel pump or fuel pump relay.

  • Treetopace Apr 30, 2013

    What is "GM/Sec Low" of "Sec High" mean as in Codes 34 & 33?

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