Turbo and forced inductionGeneric OBD-II codeUrgency: Garage soon

P0236 on Fiat: causes and affected engines

P0236 means: turbocharger boost pressure sensor 'A': circuit range or performance problem.^[1][2] Fiat has 5 documented faults that can trigger it, across 5 engines, including 1.4 T-Jet, 0.9 TwinAir and 1.0/1.3 FireFly, 1.3 Multijet and 1.9 JTD/Multijet and 2.4 JTD. Only a diagnosis can confirm the cause on your car.

Documented faults

that can trigger it

Engines

used by Fiat, with at least one of them

Fiat models

with at least one of these faults

Urgency

Garage soon

Reviewed on 9 October 20266 sources How we work

Documented faults in Fiat engines that can trigger P0236

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

1.4 T-Jet

In 500L, 500X, Bravo, Doblò II, Punto III and Tipo

- High severityFrequency: CommonTurboPremature turbocharger failure or wearOn the Fiat 500X, Fiat Tipo, Jeep Renegade and Jeep Compass there are recurring reports of turbocharger failure, sometimes at very low mileage (from 15,000 km); the manufacturer has offered occasional goodwill discounts, but there is no official campaign.Repair: €1,100–€2,300Appears at around 15,000 km

0.9 TwinAir and 1.0/1.3 FireFly

In 500, Panda III and Punto III

- High severityFrequency: OccasionalTurboEarly turbocharger failure (0.9 TwinAir)The 0.9 TwinAir's turbo can fail, in some cases at low mileage: there is one documented case replaced under warranty at 13,000 km in the Fiat 500 and another, a turbo hose, at 51,000 km in the Fiat Panda III. A specialist German source describes it as an infrequent problem.

1.3 Multijet

In 500, 500L, 500X, Doblò II, Panda III, Punto III and 2 more models

- High severityFrequency: OccasionalTurboSeized variable-geometry turboOn versions with a variable-geometry turbo, the vanes can seize through soot build-up, especially on cars used in town for short journeys. The engine loses power gradually and may give off black smoke when accelerating.Repair (garage): €450–€700

1.9 JTD/Multijet and 2.4 JTD

In Bravo, Croma, Doblò I, Punto II, Punto III and Stilo

- High severityFrequency: OccasionalTurboTurbocharger wear or failureThe turbo (fixed on the basic versions, variable geometry on the more powerful ones) fails occasionally: a documented Alfa Romeo 147 needed a new turbo at around 215,000 km, and the Opel Vectra C and Zafira B report failures among their owners, although other accounts describe it as very durable.

2.3 MultiJet

In Ducato III

- Medium severityFrequency: OccasionalEmissions controlEGR valve and throttle body clogged by carbon deposits and moistureThe 2.3's EGR and intake throttle body clog up with carbon, soot and, in the throttle body, moisture: the engine goes into limp mode, loses power and shows an EGR warning. On the dual-EGR Euro 6, the low-pressure cooler is added to the list. Almost all of this comes from forums and commercial websites.
Its page cites code P0236.

Common causes of P0236 on any make

From most to least likely, according to the sources.

1Faulty boost pressure sensor (G31 on VAG cars).^{[1][3][4][5][6]}
2Sensor wiring, connectors or supply in poor condition: short circuits, open circuits and loose, dirty or corroded connections.^[1][3][4][5]
3Leaks or damage in the boost hoses and pipes or in the intercooler, and loose clamps.^[3][4]
4Faulty sensor vacuum hoses.^[1]

What to check first

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

1Read all the stored codes and check in particular that there are no codes for the sensors' 5 V supply (in Saab's manual, P0641, P0642 and P0643): if there are, deal with them first.^[4]
2Visually check the connectors and wiring of the pressure sensor (and of the pressure regulator), looking for loose, dirty or damaged connections.^[1][3][5]
3Inspect the boost hoses and pipes, the intercooler, the clamps and the whole intake: leaks, cracks, dirt or blockages. Saab's manual suggests locating air leaks with soapy water in a spray bottle.^[3][4]

Full guide to P0236: symptoms, diagnosis and whether you can drive

Frequently asked questions

Which Fiat engines have faults that can trigger P0236?

1.4 T-Jet (1 fault), 0.9 TwinAir and 1.0/1.3 FireFly (1 fault), 1.3 Multijet (1 fault), 1.9 JTD/Multijet and 2.4 JTD (1 fault) and 2.3 MultiJet (1 fault). Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

What does code P0236 mean on a Fiat?

Turbocharger boost pressure sensor 'A': circuit range or performance problem. The control unit has detected that the signal from boost pressure sensor 'A', the one that measures the pressure the turbo generates, is not consistent: it is outside the expected range or does not agree with the other pressure data. It is therefore a plausibility code. On VW group cars (Ross-Tech cites the 2.0 TSI), it sets when the control unit detects a pressure difference of more than 75 mbar between the boost, manifold or barometric sensors. It is a generic OBD-II code: it means the same on a Fiat as on any other make.^[1][2][3]

Can I keep driving with P0236?

Garage soon. The sources do not entirely agree. Autodoc Club allows short trips, but asks for the car to be repaired as soon as possible because the engine can be damaged if the turbo receives incorrect signals. Mechanic Base, in its article on this sensor, states that you should never drive with it faulty, because of the risk of the control unit sending too much power to the turbo and damaging the engine. In Saab's manual, the control unit limits the engine to the turbo's mechanical pressure, with a noticeable loss of power, and CarWiki only mentions that the engine may go into limp-home mode.^[1][4][5][6]

Sources

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

Código OBD2 P0236: causas, síntomas y cómo corregirloAutodoc Club · Technical documentation · consulted 2 October 2026 · in Spanish
P0236 — Turbocharger Boost Sensor A Circuit Range/PerformanceThe Automotive Technician (TaT) · Technical documentation · consulted 2 October 2026
16620/P0236/000566 - Manifold Pressure / Boost Sensor (G31): Implausible SignalRoss-Tech Wiki · Technical documentation · consulted 2 October 2026
DTC P0236, P0237, or P0238 (LDK with Turbocharger) 9-5 (9650) 2010Saab Workshop Information System (WIS Online) (copia del manual de taller de Saab) · Technical documentation · consulted 2 October 2026
OBD Fehlercode P0236 | Ladedruck- SaugrohrdrucksensorCarWiki.de · Technical documentation · consulted 2 October 2026 · in German
3 Signs Of A Bad Or Failing Boost Pressure SensorMechanic Base · Other source · published 19 February 2023 · consulted 2 October 2026