Service light on Dashboard

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LEEDS
Posts: 18
Joined: 22 Nov 2023, 12:20

Service light on Dashboard

Post by LEEDS »

Further to my messages to you recently re Service light
Indicator on my dash board. I have a Citroen Picasso C3 1.6 VTR 2011.
This light keeps coming on and off on my dash board. Yesterday it was off all day. But now it's back on to day.

I got a dinogstic test done on my car this mornning and the fault came up as . Intermittent Air Flow. But no code.

As I said I had my service done recently and all was ok. Changed filters oil and Air filter. And was reset
Can you be of any more help please.

Regards
Roy
PaulC5
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Joined: 06 Jun 2023, 15:26
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Re: Service light on Dashboard

Post by PaulC5 »

Possibly there is a fault with the MAF (mass air flow) sensor or its wiring/connector. It could have been disturbed when the air filter was replaced. You could also check for an air leak between it and the engine. The MAF will be between the air filter and engine. On the parts diagram on this link it will be part no.10 https://www.ebay.co.uk/itm/275911546960 ... gIGfPD_BwE
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GiveMeABreak
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Re: Service light on Dashboard

Post by GiveMeABreak »

I will need the fault code otherwise it is just guesswork.
Please Don't PM Me For Technical Help

Marc
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GiveMeABreak
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Re: Service light on Dashboard

Post by GiveMeABreak »

I've deleted your other thread - please don't create multiple topics for the same issue as it duplicates answers. Please just update this thread in relation to this issue.

Regarding the Fault code you specified, see descriptors below. Although there is a long list of suspects, I would certainly check the Mass Air Flow Meter first and clean it with some specialist MAF cleaner first (Very carefully as the sensor wire is highly sensitive) and check all connections before moving on.
Fault Code: P3007
Description of Fault: Air circuit: Air flow lower than recommended.

Ratio of measured airflow over calculated theoretical airflow below -15% detected for 2,5 seconds.
Conditions of activation of the diagnostics

The following conditions have to be met:
- Air temperature between -20°C and 100°C
- Battery voltage between 10 and 16 V
- Turbo pressure between 740 and 1500 mbars
- Engine coolant temperature between 50 and 100 degrees C
- Engine speed between 1400 and 3000 rpm
- Engine speed variation less than 16000 rpm per second
- Air mixer open
- Exhaust gas recycling valve closed
Conditions for Fault to clear:
  • Driving for 5 minutes with decelerations of more than 10 seconds
Downgrade Modes whilst Fault is active:
  • None, but MIL Warning lamp will be illuminated.
Symptoms:
  • Jerking/stalling
  • Noise
  • Lack of power
  • Starting problem
  • Engine acceleration at wrong time
Suspect Areas:
  • Atmospheric pressure sensor in the engine management ECU
  • Air temperature sensor at the air flowmeter
  • Air flow meter
  • Air intake between the air flow sensor and the turbocharger
  • Turbocharger
  • Turbocharger fixed geometry control electrovalve
  • Turbocharger fixed geometry position repeat sensor
  • Manifold air entry pressure sensor
  • Manifold entry air temperature sensor
  • Exhaust gas recycling valve
  • Engine oil
  • Sump
  • Oil suction strainer
  • Engine oil pump
  • Lubrication circuit of the turbocharger
  • Electrical harnesses
  • Connectors
Please Don't PM Me For Technical Help

Marc
LEEDS
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Joined: 22 Nov 2023, 12:20

Re: Service light on Dashboard

Post by LEEDS »

Thank you for your response. Apologies for duplicating them. Wasn't aware i was. Anyway just to finish. Whilst i appreciate your help . The car is driving great. No problems with acceleration. Temp or any if the problems stated on the list.