cannot clear fault codes help please c3 1.4vti
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cannot clear fault codes help please c3 1.4vti
Citroen c3 picasso 1.4vti petrol 2009 Unable to clear fault codes and car wont start timing checked and spot on cam and crank sensors changed voltages and wires checked faults stay on ecu unable to clear at all
Last edited by GiveMeABreak on 01 Jun 2020, 14:07, edited 2 times in total.
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- GiveMeABreak
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Re: cannot clear fault codes help please c3 1.4vti
How do you expect the fault to be cleared if the fault hasn't been fixed?
Fault codes are there to tell you something isn't right. If you don't fix the problem the fault will only come back if you could clear it.
Pop your VIN up and I'll take a look at these fault codes for you that may give you some pointers.
Fault codes are there to tell you something isn't right. If you don't fix the problem the fault will only come back if you could clear it.
Pop your VIN up and I'll take a look at these fault codes for you that may give you some pointers.
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Marc
Marc
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Re: cannot clear fault codes help please c3 1.4vti
Here's a few to be going on with as I think I have this engine code already:
You say you changed the cam / crank sensors - where did you get them from? ECP by any chance?
You say you changed the cam / crank sensors - where did you get them from? ECP by any chance?
P0339: Engine speed sensor signal fault: Loss of synchronisation. Essentially, detection of a loss of signal from the engine speed sensor. Downgrade Modes whilst Fault is active: Deactivation of the richness regulation; Stopping of calculation of the ambient temperature. Engine Warning Lamp will be lit. Symptoms: Starting impossible, Stalling at idle, Cutting out under load. Suspect Areas: Air gap too large, Engine speed sensor, Engine ECU. |
P1694: Coherence fault between the request for engine starting and the engine speed information: Not characterised. Control of the starter without detection of drop in battery voltage and without the engine speed exceeding a threshold of about 30 rpm (For at least 5s). Conditions for Fault to clear: Starter motor active and detection of engine speed for 0.1s. Downgrade Modes whilst Fault is active: Starter control line cut. Symptoms: Starting Impossible Suspect Areas: Starter control relay (PSF1), Starter, Electrical harness, Connectors |
P0343: Inlet cylinder reference sensor signal fault: Coherence. Detection of a loss of signal from the inlet camshaft / Signal stuck in high status. Conditions for Fault to clear: At least one of the following conditions must be fulfilled:
Symptoms: Lack of power, Restarting impossible if there is a double signal fault on the inlet camshaft and the exhaust camshaft. Suspect Areas: Camshaft position sensor, Electrical harness. |
P0368: Exhaust cylinder reference sensor signal fault: Coherence. Detection of a loss of signal from the exhaust camshaft sensor (Signal stuck in high status). Conditions for Fault to clear: Exhaust camshaft sensor signals acquired and plausible. Downgrade Modes whilst Fault is active: Prohibition of adaptation and control of the exhaust camshaft, Change to butterfly mode, Deactivation of checking of the canister purge. Symptoms: Lack of power, Restarting impossible if there is a double signal fault on the inlet camshaft and the exhaust camshaft. Suspect Areas: Camshaft position sensor, Electrical harness |
P0533: Upstream oxygen sensor resistance fault: Resistance too high. Detection of an open circuit or of a short-circuit to earth on the continuous signal from the upstream oxygen sensor. Possibility 1: Internal resistance of the upstream oxygen sensor too high ; The opening cyclic ratio of the heating regulator remains at its maximum value (100 %) for 10 seconds Possibility 2: Internal resistance of the upstream sensor too high or detection of an open circuit on the earth of the continuous signal from the upstream Lambda sensor Conditions for Fault to clear: Possibility 1:
Symptoms: Emissions outside the norms, Excessive fuel consumption. Suspect Areas: Oxygen sensor, Electrical harness |
P0036: Downstream oxygen sensor heating control: Open circuit or overheating. Detection of an open circuit on the downstream oxygen sensor heating power stage, or overheating, for more than 0.5s. Conditions for Fault to clear: Absence of the fault codes P0036, P0037, P0038 for 1s. Downgrade Modes whilst Fault is active: Downstream oxygen sensor not available (not heated). Deactivation of the richness regulation (Change to open loop), No purging of the catalytic converter. Symptoms: Emissions outside the norms. Suspect Areas: Fuse, Connectors, Downstream oxygen sensor, The electrical harness, Engine fusebox, Engine ECU |
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Marc
Marc
Re: cannot clear fault codes help please c3 1.4vti
What engine is this? Is it a timing belt or timing chain?
Do the faults clear but come back as soon as you attempt to start the car? or just wont clear at all?
What happened to the car, did it cut out when driving or just would not start one day?
Do the faults clear but come back as soon as you attempt to start the car? or just wont clear at all?
What happened to the car, did it cut out when driving or just would not start one day?
- GiveMeABreak
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Re: cannot clear fault codes help please c3 1.4vti
I think this is the EP3 - but waiting for clarification.
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Marc
Marc
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Re: cannot clear fault codes help please c3 1.4vti
Yes its a horrible ep3 engine .Car just refused to start one day Was running perfect.As i say the timing chain has been checked and all lined up perfect not jumped or moved at all .Crank and cam sensors changed .Faults will not clear at all and remain on ecu even before attempting to restart Live data shows engine cranking speed at about 250 rpm .
- GiveMeABreak
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C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
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XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5644
Re: cannot clear fault codes help please c3 1.4vti
You can see from the suspect areas int he fault codes that on more than one fault the camshaft position sensor is a possibility, hence why I asked where you bought the sensors from.
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Marc
Marc
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Re: cannot clear fault codes help please c3 1.4vti
Changed from another running car
- GiveMeABreak
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C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
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XM 2.0 Turbo Prestige Emerald Green Pearlescent
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CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5644
Re: cannot clear fault codes help please c3 1.4vti
But were they identical part numbers?
Please Don't PM Me For Technical Help
Marc
Marc
Re: cannot clear fault codes help please c3 1.4vti
Strange one, were proper locking tools used to check the timing? i would maybe take the cam sensor out & inspect the the lugs on the camshaft that the sensor picks up incase it is damaged or has debris on it.
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Re: cannot clear fault codes help please c3 1.4vti
Yes proper tools used all lined up perfect no slack in the chain at all .Just weird that the fault codes are unable to clear .Its like the ecu has locked itself.I pulled a coilpack lead off and tried to start it and now have a coil pack fault that wont clear either .Could it be a canbus fault .Would underbonnet fuse box fault cause it maybe ?Tried towing it today and didnt even fire at all But rev counter worked so proves crank sensor is ok .
Re: cannot clear fault codes help please c3 1.4vti
Did you check the cam sensor pickup? id also have a look at the ECU for water ingress, if that's all ok next I would scope the signals from the cam & crank sensors. Does the cam sensor have a power supply to it?
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Re: cannot clear fault codes help please c3 1.4vti
Sorted now second hand ecu programmed in and all running sweet no codes