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Author Topic: Fault code P1781 & P1740 ??? On 2.2 FL Petrol Auto ???  (Read 1888 times)

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DrAndyB

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Fault code P1781 & P1740 ??? On 2.2 FL Petrol Auto ???
« on: 18 July 2015, 13:24:03 »
Got these from the Pending Fault codes.

Cant seemed to find them on the list ?

Car starts a great now with clean throttle body  :y

I have reset the codes and there were no other codes logged.

Not sure what they are.
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SIR Philbutt

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Re: Fault code P1781 & P1740 ??? On 2.2 FL Petrol Auto ???
« Reply #1 on: 18 July 2015, 16:44:38 »
From my Autel
P1781 - ECM actual torque signal - malfunction detected
P1740 - AT torque control. signal malfunction

Looks like something to do with gearbox, Pending codes tend to clear with ign off/on

I'd Wait to see if they come back then do something, cam sensor is used by AT ecu
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Jimbob

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Re: Fault code P1781 & P1740 ??? On 2.2 FL Petrol Auto ???
« Reply #2 on: 18 July 2015, 21:13:51 »
Memory tells me the Cam sensor on a 2.2 can give bizarre false autobox codes.

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DrAndyB

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Re: Fault code P1781 & P1740 ??? On 2.2 FL Petrol Auto ???
« Reply #3 on: 19 July 2015, 00:09:42 »
Thanks for advice and hints.

Have reset all and oil now changed to propper vx 10W/40 Semi.

Old black stuff which i drained seemed very "thin" but they had put 5W 30 full synth in !!!

I am happy now she has genuine GM oil and cleaning throttle body as per OOF guide has cured idle gremlin a treat  :y

Will check for codes in morning as all reset and gave he a run today.  Fingers crossed.

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