Question

Tiny
SUPERTIGRE
  • MEMBER
  • GMC
[code:1:726323f071]i check my oldsmobile silhouette, and I get 2 codes, 56 and 26, one says 56 QDM 2 OR B ERROR
an the other one says 26 QDM 1 FAULT.
Do you know what they means, what I have to check and how can I fix it.
thanks.
msupertigre.[/Code:1:726323f071]
Saturday, March 4th, 2006 AT 5:39 PM

1 Reply

Tiny
MVANNESSJR
  • MECHANIC
  • 223 POSTS
CODE 26

Trouble Code 26 indicates that the quad-driver is malfunctioning.

QDM symptoms:

Cooling fan(s) inoperative
Poor driveability due to 100% canister purge.
Coolant light "ON" all the time, "OFF" during bulb check.
EGR inoperative - Code 32.
TCC inoperative
This problem can be caused by:
1) Short to 12 volts on the control circuit by a shorted component.

2) Faulty ECM.
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Saturday, March 4th, 2006 AT 10:48 PM

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