Fuel and injectionGeneric OBD-II codeUrgency: Garage soon

P0263 on Citroën: causes and affected engines

P0263 means: cylinder 1 contribution/balance.^[1][2][3][4] Citroën has 8 documented faults that can trigger it, across 7 engines, including 1.4 HDi, 1.6 HDi, 1.4 and 1.6 TU3/TU5 and 2.0 BlueHDi. Only a diagnosis can confirm the cause on your car.

Documented faults

that can trigger it

Engines

used by Citroën, with at least one of them

Citroën models

with at least one of these faults

Urgency

Garage soon

Reviewed on 9 October 20265 sources How we work

Documented faults in Citroën engines that can trigger P0263

Grouped by engine or model, from most to least important. These are faults with the injectors and with the ignition coils: not all of them will necessarily set the code, and only a diagnosis confirms the cause on your car.

1.4 HDi

In C1 I, C2, C3 I and C3 II

- Medium severityFrequency: Very frequentInjectionInjectors that lose their seal and let diesel escapeThe most cited weak point of the 1.4 HDi is its injectors: over time they can lose their seal and let diesel escape, which is usually noticed as a smell of diesel in the car. It appears in the two most common outputs (68 and 70 hp) and in both cases it is identified as the engine's main weakness.

1.6 HDi

In Berlingo II, C-Elysée, C3 I, C3 II, C3 Picasso, C4 I and 5 more models

1.4 and 1.6 TU3/TU5

In Berlingo I, C2, C3 I, C4 I, Xsara and Xsara Picasso

- Medium severityFrequency: CommonIgnitionIgnition coils that fail and cause jerkingThe ignition module -a rail with two twin coils, no distributor- is the electrical fault owners cite most across all models with this engine: it usually fails between 40,000 and 150,000 km and causes jerking, an unstable idle or the engine warning light coming on.Appears at around 40,000 km

2.0 BlueHDi

In C4 Picasso II, C5 Aircross and Jumpy III

- High severityFrequency: OccasionalInjectionInjector and high-pressure pump wearThe injectors and the high-pressure pump on the 2.0 BlueHDi are among the documented faults, although in a minority of the cases recorded compared with AdBlue or the DPF. When the pump fails, metal particles can contaminate the whole circuit and make the repair far more expensive.

2.2 HDi

In C-Crosser, C5 I, C5 II, C6 and C8

- High severityFrequency: OccasionalInjectionPiezo injector wear and failureThe 2.2 HDi uses third-generation common-rail injection with piezo injectors at up to 1,800-2,000 bar. Fiches-auto documents injector cases across several power outputs, without it being the most repeated fault, with symptoms of hard starting, jerking or higher fuel consumption.

2.0 and 2.2 16v EW10/EW12

In C4 I, C4 Picasso I, C5 I, C5 II, C8, Xsara and Xsara Picasso

- Medium severityFrequency: OccasionalIgnitionFaulty ignition coilsIgnition coils are the fault reported by the press (gebrauchtwagenberater.de, CarsGuide) and by 16 of the 170 owner reviews of the 2.0 EW10; they also appear on the 2.2. A weak coil causes misfires, jerking and the engine warning light coming on.

2.2 / 2.4 / 3.2 TDCi (Puma)

In Jumper II

- Medium severityFrequency: OccasionalInjectionFaulty injectors on the 2.2 and 2.4 TDCiHaynes documents faulty injectors on the 115 hp Transit 2.2 and the 140 hp 2.4, and L'argus reports an injector recall on the 2014-2015 Boxer and Jumper 2.2 HDi. They cause rough idle, loss of power or stalling.

Common causes of P0263 on any make

From most to least likely, according to the sources.

1Faulty cylinder 1 injector: dirty, stuck, leaking or delivering an incorrect flow. This is the first cause for Autodoc Club and AutoDTCs, and CarParts.com also cites it.^[1][3][5]
2Injector electrical problems: damaged wiring, loose or corroded connectors.^[1][3][5]
3Low compression in that cylinder or an internal mechanical engine fault: worn piston rings, a burnt or leaking valve, a head gasket. AutoDTCs also cites valvetrain faults, such as a worn camshaft lobe, a collapsed tappet or a valve out of tolerance.^[3][5]
4Poor fuel supply: faulty pump or insufficient pressure, clogged filter, restricted lines, contaminated fuel or air in the circuit.^[1][5]

What to check first

The first diagnostic steps, from the most likely and cheapest to check to the most expensive.

1Read the code and the freeze-frame data with a scan tool and see whether other codes are stored: for other cylinders, for the same cylinder's injector circuit or for misfires.^[4][5]
2Check the cheapest things: the connectors and wiring of the cylinder 1 injector (corrosion, damage, play) and the vacuum hoses or any unmetered air intrusion.^[1][3][5]
3With the scan tool, run a cylinder balance test to confirm that it is cylinder 1 that is consistently performing worse.^[5]

Full guide to P0263: symptoms, diagnosis and whether you can drive

Frequently asked questions

Which Citroën engines have faults that can trigger P0263?

1.4 HDi (1 fault), 1.6 HDi (2 faults), 1.4 and 1.6 TU3/TU5 (1 fault), 2.0 BlueHDi (1 fault), 2.2 HDi (1 fault) and 2.0 and 2.2 16v EW10/EW12 (1 fault). Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

What does code P0263 mean on a Citroën?

Cylinder 1 contribution/balance. The ECU has detected that cylinder 1 is performing worse than the others: for the engine to run well, all cylinders must contribute similar power. According to TaT, it detects this by monitoring variations in crankshaft speed. AutoDTCs, on its P0266 page (which describes the same mechanism for cylinder 2), explains that crankshaft acceleration is measured during each cylinder's stroke and that the code is set when that cylinder's contribution falls outside the calibrated parameters. It is a generic OBD-II code: it means the same on a Citroën as on any other make.^{[1][2][3][4][5]}

Can I keep driving with P0263?

Garage soon. The sources agree that it must be repaired soon, without being an emergency. Autodoc Club allows short trips but does not recommend it, because a faulty injector can damage the engine and the catalytic converter. AutoDTCs classes it as moderate severity and says it normally does not leave you stranded; on its P0266 page it adds that it is not an immediate safety risk, but that a weak cylinder means loss of power and vibration, and that driving for a long time can worsen mechanical damage and consumption. CarParts.com does not state a severity.^[1][4][5]

Sources

Every fact on this page links to its source. If you find an error, let us know.

Código OBD2 P0263: causas, síntomas y cómo corregirloAutodoc Club · Technical documentation · consulted 4 October 2026 · in Spanish
P0263 — Cylinder 1 Contribution/Balance FaultThe Automotive Technician (TaT) · Technical documentation · consulted 4 October 2026
P0263 Code: Cylinder 1 Contribution/BalanceCarParts.com · Technical documentation · consulted 4 October 2026
P0263 – Cylinder 1 Contribution/BalanceAutoDTCs · Technical documentation · consulted 4 October 2026
P0266 – Cylinder 2 Contribution/BalanceAutoDTCs · Technical documentation · consulted 4 October 2026