DS3 THP P2263 and P0313

[Miguel Cardoso]

Hi everyone,

I have a 2013 Citroën DS3 1.6 THP (155k km) and I’m trying to diagnose an issue that only happens under heavy acceleration.

Symptoms:

• Car drives completely normal under light / medium throttle

• When I go full throttle, the engine light comes on

• The car immediately goes into limp mode and loses power

• If I clear the codes, it drives normally again until I push it hard

There is no constant rough idle. The issue only appears under high load.

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Parts already replaced:

• Diverter valve (recirculation valve)

• Turbo pressure sensor (MAP sensor)

• Spark plugs (recent)

Ignition coils are still original.

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OBD Scan Report:

P0313 – Misfire detected – low fuel level
Status: Confirmed / Stored in memory

P2263 – Turbocharger boost pressure performance problem
Status: Pending / Present during current drive cycle

No transmission, ABS, or power steering faults.

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Additional info:

• No permanent misfire at idle

• Issue only appears under boost / full throttle

• I have not yet confirmed wastegate rod play

• Considering testing or replacing the Pierburg boost control solenoid

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Has anyone experienced P2263 + P0313 together on the THP?
Could the misfire be caused by incorrect boost control (lean condition under load)?

Would you recommend replacing the boost control solenoid first, or checking wastegate play?

Any input from other THP owners would be appreciated.

Thanks in advance!

[PaulC5]

Something to read plus if it has a fuel filter that might need replacing viewtopic.php?t=87845

[LeRoy KinCaid]

Is fuel pump delivering adequate pressure??

[andyandjulie]

I agree with Paul. The fuel filter is the prime suspect. I have had first hand experience of this. I notice you haven't changed that yet from your posts. Good luck.

[gwest]

It is very useful to be able to record fuel pressure against the target values set by the engine ecu. Your symptoms are also consistent with heavily fouled inlet tracts and valves, for which there is no obvious diagnosis. If you have not had your inlet valves cleaned then by now they will surely require it.