Home > Technical (L322) > 5hp24 transmission failsafe prog |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
On my way back from work yesterday got a "transmission failsafe program message". It was near home after a long city commute with lots of stop and go traffic. I must have been in 1st gear moving slowly after a brief stop in the traffic. Almost immediately pulled over and got the IID connected which showed something along the lines of "Pressure Solenoid 5" under the transmission group.
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26th Oct 2024 8:59am |
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RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 963 |
New solenoids seem to be stupidly expensive now, so I’d be tempted to run the vehicle for a while and see if the error reoccurs, just in case it was a glitch. You could maybe swap around EDS 5 with one of the other (identical) solenoids to see if the fault moved with it, to check if it was the wiring at fault rather than the solenoid.
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26th Oct 2024 12:53pm |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
Hey Phil, thanks for chiming in. I'll look up the solenoid changing procedure on the workshop manual and swap it during the oil change next week, if I can't source a new one locally at a reasonable price. Btw drove another 100km today through all sorts of roads and traffic without any issues. |
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26th Oct 2024 8:34pm |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
Two weeks on and the problem hasn't reappeared; must have been a glitch. Had the oil changed yesterday and inspected the solenoid plugs and wires while at it. Everything looks fine. On a side note, the oil was pretty bright for nearly 49000km and the magnets had minimal metal powder on them. I did used to get a minor rpm fluctuation on a certain stretch of a road while a gear change was about to happen (almost impossible to tell by anyone not regularly driving the car) but apparently this is now cured by the fresh oil.
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7th Nov 2024 12:07pm |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
Seems that the problem did come back this morning, while driving in town, probably with 4th gear. I do remember hitting a slight bump then immediately getting the "Transmission failsafe program message". I drove another 400 or so meters before stopping, switched ignition off and restarted and the message disappeared. I did pull the codes this time though.
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20th Nov 2024 9:09am |
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RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 963 |
The ‘noise on actuator signal’ message for the transfer box relates to a faulty potentiometer in the shift motor. This would certainly generate the failsafe message as the vehicle doesn’t know which range it is in.
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20th Nov 2024 12:14pm |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
Hey Phil,
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20th Nov 2024 12:23pm |
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RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 963 |
I think you’re going to have to swap EDS 5 around with 2, 3 or 4 to see if the error moves with the solenoid. Buying a new solenoid would be an expensive way to find out that it was the wiring loom at fault.
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20th Nov 2024 4:57pm |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 584 |
I should have done that with the fluid change. But since neither myself nor my mate was very confident doing the swap I decided to take my chances granted it hadn't come back then. I'll keep an eye out for a solenoid and harness and perhaps try to reach out to the official ZF dealer here while trying to kick the can down the road until next service. |
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20th Nov 2024 8:25pm |
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