Warning lights of the Renault Master: what each light means
In the 2 generations of the Renault Master, the documented faults light up 3 warning lights on the dashboard. The most frequent: engine warning light (3 faults), adBlue warning (1 fault) and DPF warning light (1 fault).
Which warning lights the faults of the Renault Master trigger
Red ones first, and those that call for stopping. Below each warning light, the documented faults that trigger it, with their pages.
Engine fault warning light (check engine)
Urgency: Garage soonYellow or amberSymbol: outline of an engine seen from the side, in yellow or orange
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.
What to do: 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.
3 documented faults that trigger it in the Renault Master
- High severity: Clogged or broken EGR valve damaging the turbo · 2.3 dCi (M9T) engine · III
- Medium severity: Blocked EGR valve and turbo and injector faults on the 2.2 dCi (G9T) · 2.2 dCi and 3.0 dCi V6 engine · II
- Medium severity: Faulty injectors on the 2.3 dCi · 2.3 dCi (M9T) engine · III
AdBlue system warning
Urgency: Garage soonYellow or amberSymbol: AdBlue system warning in the instrument cluster, yellow or orange at first, usually accompanied by a text message and, later on, a countdown in kilometres
Diesels with selective catalytic reduction (SCR) use AdBlue to cut NOx emissions. A warning with a countdown ("engine will not restart in X km") indicates a low level or a fault in the AdBlue tank, pump, heater or injector. When the countdown reaches zero, the car will not start again.
What to do: If the tank is full and the warning persists, the problem lies with the system. Go to a garage before the countdown ends and keep your receipts in case the fault is covered by a manufacturer campaign.
1 documented fault that triggers it in the Renault Master
- Low severity: SCR system and AdBlue tank faults · 2.3 dCi (M9T) engine · III
Particulate filter warning light (DPF)
Urgency: Garage soonYellow or amberSymbol: particulate filter symbol on the dashboard, normally amber; its design varies by manufacturer
On modern diesels it means the particulate filter is clogged with soot and has not been able to regenerate. It is common in cars used mostly for short town journeys, although it can also be caused by a sensor or by an injection or EGR fault.
What to do: If the handbook allows it, a 20-minute drive on a motorway at a steady speed can complete the regeneration. If the light stays on or you lose power, go to a garage.
1 documented fault that triggers it in the Renault Master
- Medium severity: Diesel particulate filter (DPF) clogged in urban use · 2.3 dCi (M9T) engine · III
Frequently asked questions
Which warning lights come on most in the Renault Master?
Engine warning light: 3 documented faults, such as clogged or broken EGR valve damaging the turbo. AdBlue warning: 1 documented fault, such as SCR system and AdBlue tank faults. DPF warning light: 1 documented fault, such as diesel particulate filter (DPF) clogged in urban use.
Which warning light of the Renault Master is the most serious?
None of the warning lights with documented faults in the Renault Master requires an immediate stop. The most serious fault that triggers one of them is clogged or broken EGR valve damaging the turbo (engine warning light), of high severity severity.
Which generation of the Renault Master has the most faults that trigger warning lights?
Renault Master III (4 faults) and Renault Master II (1 fault).
A warning light has come on in the Renault Master: what should I do?
Find which warning light it is on this page and check its urgency. For the others, book an appointment at a garage and have them read the fault code with an OBD reader: it shows which system has failed.