DEF Warning on a Diesel: Fuel Delivery or Tow?

Diesel exhaust-fluid warning on your dashboard? Call Rick’s with the exact message before booking fuel delivery.

“Exhaust fluid low,” a system fault and an empty diesel fuel tank are different problems. Read the whole dashboard message to us, including any distance countdown or operating restriction. A photo taken while safely parked can help you preserve the exact wording.

Diesel exhaust fluid, or DEF, belongs in its own system. It is not a substitute for diesel fuel. Ford’s DEF guidance describes speed restrictions and an eventual idle-only condition for the vehicles covered when fluid is depleted or contaminated. Your model’s warning and recovery requirements may differ; use its own manual.

Ford’s selective catalytic reduction guidance distinguishes a low-fluid warning from a system malfunction. It also notes that a refill may take a short time to register. A warning that remains after a refill needs the correct assessment, not a promise that another bottle will fix it.

Tell us what product was added, approximately how much, which filler was used and whether the engine ran afterward. Do not put DEF in the fuel tank or dilute it. Ford says not to switch the ignition on if DEF entered the diesel fuel tank; if incorrect fluid entered the DEF tank, do not attempt to start the engine. Arrange professional inspection.

Rick’s fuel-delivery service offers regular or premium gasoline. Do not book that service expecting DEF delivery, diesel delivery or emissions-system repair. Explain the warning first so the request is not mistaken for a simple gasoline run-out.

If the vehicle needs transport, call about compatible light-duty wheel-lift towing, with dollies when appropriate. We check the model, drivetrain, loaded weight, condition and manufacturer transport requirements. A diesel engine does not tell us whether the vehicle fits our equipment. Rick’s does not offer medium-duty, heavy-duty or flatbed towing.