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P1935 Ford Code - Fuel Additive Level Low

Quick Answer

The P1935 Ford diagnostic trouble code indicates that the fuel additive level in the vehicle is low. Common causes include Low fuel additive level in the tank, Faulty fuel additive pump, Clogged fuel additive lines. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1935 Ford indicates Fuel Additive Level Low.
Common causes
Common causes include Low fuel additive level in the tank, Faulty fuel additive pump, Clogged fuel additive lines.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 05, 2024
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Code P1935 Ford Description

The P1935 Ford diagnostic trouble code indicates that the fuel additive level in the vehicle is low. This code is commonly found in diesel vehicles that use a diesel particulate filter (DPF) additive to reduce emissions. The additive is typically a liquid solution that is injected into the exhaust system to help burn off soot particles that have accumulated in the DPF. When the additive level is low, the DPF may not function properly, leading to reduced fuel efficiency, increased emissions, and potential damage to the engine.

OBDII Code P1935 Ford - Fuel Additive Level Low
P1935 Ford Code - Fuel Additive Level Low

Common Causes of P1935 Ford

  1. Low fuel additive level in the tank
  2. Faulty fuel additive pump
  3. Clogged fuel additive lines
  4. Electrical issues with the fuel additive system
  5. Faulty DPF sensor

Symptoms of P1935 Ford

  1. Reduced fuel efficiency
  2. Check engine light illuminated
  3. Decreased engine performance
  4. Increased exhaust emissions
  5. Rough idling or hesitation during acceleration

How to Fix P1935 Ford

  1. Check the fuel additive tank level and refill if low.
  2. Inspect the fuel additive pump and lines for clogs or damage.
  3. Test the DPF sensor for proper function and replace if necessary.
  4. Reset the trouble code and monitor the system for any reoccurrence.
  5. If the issue persists, consult a professional mechanic for further diagnosis and repair.

Cost to Fix P1935 Ford

The cost of repairing a P1935 Ford code related to low fuel additive level can vary depending on the specific cause of the issue. In general, the cost can range from $100 to $500 for parts and labor. It's important to keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's recommended to inquire about local rates for a more accurate estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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