Skip to content
MotorFiable

PSA/Stellantis 1.5 BlueHDi (DV5)Urgency: Garage soon

Engine fault warning light (check engine) in the 1.5 BlueHDi engine: causes

In the 1.5 BlueHDi engine, 4 documented faults may be the cause; the most important: wear and breakage of the 7 mm chain between the camshafts, AdBlue tank and pump failure and diesel leak at the common rail (2026 recall).[1][6][7][10]

What to do now

Garage soon

If it stays on steadily, you can drive gently to a garage and ask for a fault code read-out. If it flashes or you notice a loss of power, slow down and get to a garage as soon as possible.

What it means

The orange engine-shaped warning light comes on when the ECU detects a fault affecting combustion or emissions. If it flashes, it usually points to misfires that can damage the catalytic converter.

Engine warning light: causes in all cars

19 sourcesHow we work

Engine faults that cause it

From most to least important. Under each fault, how the symptom shows up. Check the affected years and versions on each page.

  1. Source for the symptom[1]

  2. Source for the symptom[6][7]

  3. Source for the symptom[10]

  4. Source for the symptom[11]

How much it can cost

Depending on the cause, repair at an independent garage ranges from €730[1][2][3][4][5] (wear and breakage of the 7 mm chain between the camshafts) to €820[1][2][3][4][5] (wear and breakage of the 7 mm chain between the camshafts), including VAT.

Most serious fault among the possible causes: Critical severity

Other common causes: engine warning light

Besides the documented faults of the 1.5 BlueHDi, these are the most common causes on any car according to the sources.

  • Faulty lambda sensor (oxygen sensor)[13][14]Common
  • Dirty or blocked EGR valve[13][15]Common
  • Deteriorated or blocked catalytic converter[13][16][17]Common
  • Spark plugs, coils or ignition leads in poor condition[13][18]Common
  • Faulty injectors[13]Possible
  • Blocked particulate filter[15]Possible

What to check first

  1. Note how the light behaves (steady or flashing; yellow, orange or red) and whether the car loses power, jerks, makes noises or gives off smoke. That decides whether you can carry on or must stop.[13][19]
  2. Check that the fuel filler cap is properly closed: a badly closed cap is one of the causes RACE cites and the easiest to rule out.[13]
  3. Have the codes read through the OBD port at a garage with a diagnostic machine: the error codes point to the part that is failing (sensor, EGR, injectors, ignition, catalytic converter).[13][17][18]
  4. Repair the cause and only then reset the light with the diagnostic machine. If you clear it without repairing, it will come back on.[13]
Complete guide: engine fault warning light (check engine)

Cars with the 1.5 BlueHDi engine

Open yours to see only the faults that affect it according to its years and versions.

See the 34 cars with the 1.5 BlueHDi engine

Frequently asked questions

Engine warning light in the 1.5 BlueHDi: what could it be?

In the 1.5 BlueHDi engine, 4 documented faults may be the cause; the most important: wear and breakage of the 7 mm chain between the camshafts, AdBlue tank and pump failure and diesel leak at the common rail (2026 recall). Each fault has its own page with the affected years and versions, the cause and how to check for it.

Engine warning light in the 1.5 BlueHDi: is it serious?

Urgency: garage soon. If it stays on steadily, you can drive gently to a garage and ask for a fault code read-out. If it flashes or you notice a loss of power, slow down and get to a garage as soon as possible. The most serious fault that causes it on this engine has critical severity.

Engine warning light in the 1.5 BlueHDi: how much does it cost to fix?

It depends on the cause: at an independent garage, from €730 (wear and breakage of the 7 mm chain between the camshafts) to €820 (wear and breakage of the 7 mm chain between the camshafts), including VAT.

Sources

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

  1. Stellantis llama a revisión al motor diésel 1.5 BlueHDi: ¿cuál es el problema y cuál la solución?coches.com · Motoring press · published 28 July 2025 · consulted 26 September 2026 · in Spanish
  2. Kit cadena 8mm YH01 PSA 1.5 HDi / BlueHDi reforzadoRectificados Hermanos Hurtado · Technical documentation · consulted 26 September 2026 · in Spanish
  3. Moteur diesel 1.5 BlueHDi de Stellantis : la grogne monteUFC-Que Choisir · Consumer association · published 10 January 2025 · consulted 26 September 2026 · in French
  4. ¿Estás cobrando lo justo en tu taller? Así está la mano de obra por hora en 2025Infotaller · Motoring press · published 9 September 2025 · consulted 26 September 2026 · in Spanish
  5. ¿Cuál es el precio de la mano de obra en los talleres de las 10 marcas más vendidas en España?km77 · Motoring press · published 30 December 2024 · consulted 26 September 2026 · in Spanish
  6. Solución fallo AdBlue Peugeot, Citroën y Opel: evita cambiar el depósitoST Automoción · Other source · published 11 December 2025 · consulted 26 September 2026 · in Spanish
  7. La OCU quiere tomar medidas ante los problemas del sistema de AdBlue de Citroën y Peugeotcoches.com · Motoring press · published 30 May 2023 · consulted 26 September 2026 · in Spanish
  8. OCU y BEUC consiguen que Stellantis amplíe la garantía de los depósitos AdBlue defectuososOCU · Consumer association · published 27 December 2024 · consulted 26 September 2026 · in Spanish
  9. Stellantis amplía las compensaciones por los problemas técnicos de sus depósitos AdBlueMinisterio de Derechos Sociales, Consumo y Agenda 2030 · Official body · consulted 26 September 2026 · in Spanish
  10. 1.5 BlueHDi. Stellantis rappelle plusieurs milliers de véhicules pour un problème d'injectionL'argus · Motoring press · published 14 March 2026 · consulted 26 September 2026 · in French
  11. Llamada a revisión de Stellantis a estos coches diésel por avería graveAutofácil · Motoring press · published 9 April 2026 · consulted 26 September 2026 · in Spanish
  12. Stellantis 1.5 BlueHDi : de la casse de chaîne au souci de courroieAutomag · Motoring press · published 9 April 2026 · consulted 26 September 2026 · in French
  13. 7 razones por las que el testigo de fallo del motor se enciende en un cocheRACE · Motoring press · published 23 June 2026 · consulted 2 October 2026 · in Spanish
  14. Sonda lambda o sensor de oxígeno: síntomas y averíasRACE · Motoring press · published 31 October 2023 · consulted 2 October 2026 · in Spanish
  15. Testigo de control de los gases de escapeRACE · Motoring press · published 11 June 2026 · consulted 2 October 2026 · in Spanish
  16. Catalizador de un coche: ¿cómo funciona y qué síntomas de fallo puede dar?RACE · Motoring press · published 8 March 2022 · consulted 2 October 2026 · in Spanish
  17. Código de avería P0420 - guía paso a paso para su diagnóstico y resoluciónAutodoc Club · Technical documentation · consulted 2 October 2026 · in Spanish
  18. Código de avería P0300 - guía paso a paso para su diagnóstico y resoluciónAutodoc Club · Technical documentation · consulted 2 October 2026 · in Spanish
  19. Fallo del motor: guía completa de los símbolos y testigos amarillos en el cocheAutodoc Club · Technical documentation · published 9 September 2026 · consulted 2 October 2026 · in Spanish