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Buick 92 code 26 - 1992 Buick Regal

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buick 92 code 26 - f497a301-5e49-4ecd-ae25-0ec3e6151d27.jpg
code 26 is .... Quad Driver Module (QDM A) error

Posted on Oct 12, 2013

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Quad driver code 26.


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Probable cause on a 1992 buick code 26 and 42 show up can some one help me please


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Oct 11, 2013 | 1992 Buick Regal

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I have a 91 Buick Century limited 3.3L with a 3300 engine. I ran a diagnostic scan of which produced the two-digit codes 12, 26, and 27, and In attempting to look up these codes, I found a website on...


DTC 26 and 27 refers to a QDM (Quad Driver Module) fault.
The Quad Driver is a "safety valve" for the ECM controlled circuits, the quad driver controls up to 4 circuits.

There are multiple quad drivers in the ECM. The QDM shuts down a shorted circuit to prevent high current flow from damaging the ECM. So the DTC 26 or 27 will isolate the problem to 1 QDM. You will need a repair manual with electrical diagrams and DTC flow charts to determine which of the circuits controlled by that QDM are failing.

Usually DTC 26 refers to the Torque Converter Clutch solenoid and related circuit. Most likely you have a shorted TCC solenoid or the harness connected to it, The solenoid is internal in the transmission accessible from the side cover.

Also, keep in mind the single most cause for any code will be a power or ground problem. Clean all the battery cables, and any and all cables or wires that attach from the engine to the firewall.

Hope this helps; also keep in mind that your feedback is important and I will appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Nov 28, 2011 | 1991 Buick Century

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What does code 26 mean?


Did you try going to Advance Auto or a similar business to check the code for that. Sometimes they can get you in the ballpark or check error codes online.

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'92 olds 88/3.8 showing code 26. what does it mean


26 means: quad-driver module (computer) circuit #1 fault
replace the ECM.

Feb 19, 2010 | 1992 Oldsmobile 88

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92 cutlass ciera 3.3L stalls out idles eratically. trouble codes 15 16 21 26 43.i cant find the meanings for the codes


2 digit trouble codes 15coolant sensor or circuit/low temperature indicated 16system voltage out of range 21thottle position sensor[tps] or circuit vottage high 26quaddriver module circuit43low voltage at ecm terminal l [carbureted models]

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1992 Buick LeSabre Custom....180K on the odometer...stalls at low speeds....sometimes at highway speeds without warning...error code 17 is popular...I have a 41 also but the magnet has been missing 2 years...


dont know what the code are w/out looking them up however i do know that is a common problem when ignition coils or 1 ign coil goes bad. or distributor shaft wears out, which i dont think 92 buicks have. your 92 buick should be ign. coils . ignition coils need tested at a auto part store.most are free test call them to make sure.

Jun 25, 2009 | 1993 Buick LeSabre

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1989 lesabre engine codes


26 is a quad driver failure, 41 is a cam sensor failure. I can give you a test procedure for 26 but for 41 you likely need to replace the magnet that is in the cam gear for the cam sensor pick-up.

Mar 24, 2009 | 1989 Buick LeSabre

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