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Author Topic: Intermittent safe mode and no codes  (Read 5251 times)

Offline alexk

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  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Intermittent safe mode and no codes
« on: August 14, 2014, 07:48:50 AM »
Hi, I'm getting safe mode occurring (when I restart the engine it goes away).  Have scanned for faults but nothing comes up. If safe mode is engaged should'nt the ecu have some record if it? The last fault I read was to do with the injector quantity adjuster which I haven't managed to investigate yet.

Offline insanitybeard

  • Greetings from Mr Chick!
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  • Model: Galaxy Mk2
  • Spec: '54 130ps TDI Ghia
  • First Name: Paul
  • Region: South West
  • Country: United Kingdom
Re: Intermittent safe mode and no codes
« Reply #1 on: August 14, 2014, 10:25:57 AM »
I'm not sure what the issue might be but the ECU will only log a fault code if the various signals from the sensors that it uses/monitors fall outside of an expected range, therefore if whatever's causing the fault isn't throwing the sensor readings sufficiently out it won't log a fault.

E.G, if it was due to a drop in fuel pressure due to something like a split diaphragm then it could cause a loss of performance but not necessarily log a fault code if there isn't a sensor to 'see' the loss of pressure.
« Last Edit: August 14, 2014, 11:21:05 AM by insanitybeard »
Always learning..... Often by mistakes!

Offline alexk

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  • Posts: 165
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  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent safe mode and no codes
« Reply #2 on: August 14, 2014, 05:04:59 PM »
I see your point but isn't limp mode something that the ecu initiates due to recognising a fault? I assume it is limp mode I'm getting as the normal performance (full power) resumes when the engine is restarted.

Offline alexk

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  • Posts: 165
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  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent limp mode and no codes
« Reply #3 on: August 14, 2014, 05:06:54 PM »
Hi, I'm getting safe mode occurring (when I restart the engine it goes away).  Have scanned for faults but nothing comes up. If safe mode is engaged should'nt the ecu have some record if it? The last fault I read was to do with the injector quantity adjuster which I haven't managed to investigate yet.

Offline insanitybeard

  • Greetings from Mr Chick!
  • *
  • Posts: 2427
  • Thanked: 71
  • Model: Galaxy Mk2
  • Spec: '54 130ps TDI Ghia
  • First Name: Paul
  • Region: South West
  • Country: United Kingdom
Re: Intermittent safe mode and no codes
« Reply #4 on: August 14, 2014, 05:31:34 PM »
I see your point but isn't limp mode something that the ecu initiates due to recognising a fault? I assume it is limp mode I'm getting as the normal performance (full power) resumes when the engine is restarted.

It depends- is it definitely going into an ECU induced limp mode or is it an (engine) power loss caused by e.g, loss of fuel pressure, loss of vacuum somewhere, an intermittent electrical fault.....

Usually these kind of faults will be picked up by the ECU when a sensor reading goes outside of the expected perameters but not always. For example, the relay 109 fault on the diesels can cause (electrical) power loss to several systems but won't register a fault.
Always learning..... Often by mistakes!

Offline alexk

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  • Posts: 165
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  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent safe mode and no codes
« Reply #5 on: August 15, 2014, 10:03:34 AM »
I assume it's limp mode as normal function returns when the engine is restarted. Is there anything else that could be 'reset' by turning the engine off?

Offline Chrispb

  • Mindsaysyesbodysaysnono
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  • Model: Galaxy Mk2 Auto
  • Spec: 52reg TDI 115 Ghia
  • First Name: Chris
  • Region: South East
  • Country: United Kingdom
Re: Intermittent safe mode and no codes
« Reply #6 on: August 15, 2014, 12:48:02 PM »
Are you still getting a fault code for the quantity adjuster?

Just thinking your setup is not picking up codes that are present.

Test your VCDS set up by inducing a fault code, disconnect MAF sensor multiplug then start engine this will give you a code for MAF sensor short to +

Boost issues will leave a code whether it's pos or neg deviation that's 17965 & 17964
Also Accelerator position sensor G79 can give codes 18047 and 00777
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.

Upgraded Eberspächer booster heater  to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me.
All for a pint of Strongbow.

The FordMPV.com Forum - The free forum for questions and answers relating to the Ford Galaxy, S-Max and C-Max

Offline alexk

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  • Posts: 165
  • Thanked: 0
  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent safe mode and no codes
« Reply #7 on: August 15, 2014, 03:40:13 PM »
No I am not getting any fault codes now. Will try what you suggest and see what happens.

Offline alexk

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  • Posts: 165
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  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent safe mode and no codes
« Reply #8 on: September 18, 2014, 11:19:29 AM »
Hi Chris, finally got round to checking the vagcom and I don't think uts working properly alright. Pulled the maf out with the engine running and got no fault codes from the vcds-lite. I also tried to reset the quantity adjuster as part of trying to sort out this intermittent limp mode problem. Got to the point where I entered new values and heard the engine tone change but was unable to save the changes as it said I needed the registered version to do that. Anyway am not sure it would have solved the problem if the adjuster is sticking.
Question is: can I  do anything to the vcds so that it will pick up the fault codes properly?

Offline Chrispb

  • Mindsaysyesbodysaysnono
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  • Posts: 3024
  • Thanked: 112
  • Model: Galaxy Mk2 Auto
  • Spec: 52reg TDI 115 Ghia
  • First Name: Chris
  • Region: South East
  • Country: United Kingdom
Re: Intermittent safe mode and no codes
« Reply #9 on: September 18, 2014, 12:44:33 PM »
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.

Upgraded Eberspächer booster heater  to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me.
All for a pint of Strongbow.

The FordMPV.com Forum - The free forum for questions and answers relating to the Ford Galaxy, S-Max and C-Max

Offline alexk

  • *
  • Posts: 165
  • Thanked: 0
  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent limp mode and no codes
« Reply #10 on: September 20, 2014, 05:40:03 PM »
Hi chris, I tried to reset the latency as per instructions but in my device manager (win 7) I was not given the option, only input and output rate. Output was at 16 and I reset it to 2 and the input level followed automatically to 4. When I connected the lead to the car the interface was found but there was a message that was 'poor'. Still no fault reported on vcds.

Offline Chrispb

  • Mindsaysyesbodysaysnono
  • *
  • Posts: 3024
  • Thanked: 112
  • Model: Galaxy Mk2 Auto
  • Spec: 52reg TDI 115 Ghia
  • First Name: Chris
  • Region: South East
  • Country: United Kingdom
Re: Intermittent safe mode and no codes
« Reply #11 on: September 20, 2014, 07:52:13 PM »
A lot of the cables from ebay only work with XP are you sure yours is OK for Win7
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.

Upgraded Eberspächer booster heater  to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me.
All for a pint of Strongbow.

The FordMPV.com Forum - The free forum for questions and answers relating to the Ford Galaxy, S-Max and C-Max

Offline alexk

  • *
  • Posts: 165
  • Thanked: 0
  • Model: Galaxy Mk1
  • Spec: 1999 zetec 110 tdi
  • Region: Ireland
Re: Intermittent safe mode and no codes
« Reply #12 on: September 20, 2014, 09:29:10 PM »
Dammit! Just checked my eBay history from May 2013 and it is indeed a cable for xp only. That explains some frustrations

 

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