Date: 11 Apr 2007 22:09:04 GMT
From: Dave Hinz <>
Subject: Re: 9-3 viggen - Throttle Motor. Full PWM in Closing Direction

On 11 Apr 2007 08:30:34 -0700, pzi <pzinospamnet> wrote: > I get check engine light with two fault codes: 1260 and 1251 after I > took the cylinder head off to change the head gasket. > The first one 1260 is the "Throttle Return Spring. Too Low Force" and > the second one 1251 is "Throttle Motor. Full PWM in Closing > Direction". I understand the first one but what is PWM in the > second? Take a look at the spring on the left side of your throttle assembly, where the cable from the pedal goes in to it. There's a spring there which can be adjusted. lift up the tail on the left /bottom (little tab of spring sticks out), rotate the black plastic assembly in the direction that adds spring tension. Start with one notch. Not sure I can describe the base setting of mine without pictures. > When this happens I feel a bit of rough operation of the accelerator > pedal. I think this may be the accelerator pedal wire dirty or > damaged. Strange is that this does not happen all the time - all > clear for 30 min of driving and then it is. I read the codes and > clear them and its ok for next 30 min. Any other ideas? I'd say that since you have the means to read and clear the codes, adjust the mechanical problem that you can, and see if the other code goes away. The throttle assembly isn't too much of a PITA to replace but it's not cheap. The local specialist told me "sometimes resetting it takes care of things" but obviously that doesn't address the root cause of why it jumped a notch in the first place. Let us know what you find, please. More data we have on this beastie the better. Dave Hinz

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