P1935 Mercury Code - Fuel Additive Level Low
Quick Answer
P1935 Mercury indicates Fuel Additive Level Low. Common causes include Faulty Fuel Additive Level, Fuel Additive Level harness is open or shorted, Fuel Additive Level circuit poor electrical connection. 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 Mercury indicates Fuel Additive Level Low.
- Common causes
- Common causes include Faulty Fuel Additive Level, Fuel Additive Level harness is open or shorted, Fuel Additive Level circuit poor electrical connection.
- 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.
Code P1935 Mercury Description
What are the Possible Causes of the DTC P1935 Mercury?
- Faulty Fuel Additive Level
- Fuel Additive Level harness is open or shorted
- Fuel Additive Level circuit poor electrical connection
How to Fix the DTC P1935 Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1935 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1935 Mercury Code
1. What does the OBDII code P1935 mean on a Mercury?
P1935 indicates a "Fuel Additive Level Low" issue, meaning the diesel exhaust fluid (DEF) or fuel additive reservoir is below the minimum level required for proper operation.
2. What are the common symptoms of code P1935 in a Mercury vehicle?
Typical symptoms include a warning light on the dashboard, reduced engine performance, or the vehicle entering limp mode.
3. What causes code P1935 to appear on a Mercury?
Common causes include a low level of fuel additive or DEF, a faulty additive level sensor, wiring issues, or a malfunctioning additive pump.
4. Can I drive my Mercury with the P1935 code active?
Driving with the P1935 code may cause reduced engine performance, and ignoring it for too long could lead to further emissions system issues.
5. How do I fix the P1935 code on my Mercury?
Start by refilling the fuel additive or DEF tank. If the code persists, inspect the level sensor, wiring, and pump for faults.
6. How do I check the fuel additive or DEF level in a Mercury?
Many Mercury vehicles display DEF or additive levels on the dashboard. If not, consult the owner’s manual or use a diagnostic scan tool.
7. What tools are needed to diagnose the P1935 code in a Mercury?
A compatible OBDII scanner can help check for the code, and a multimeter may be needed to test the sensor and wiring.
8. Is the P1935 code related to diesel engines only?
Yes, P1935 is specific to diesel engines that use a fuel additive or DEF system for emissions control.
9. How much does it typically cost to fix the P1935 code on a Mercury?
Costs vary but refilling the additive tank typically ranges from $10-$50, while sensor or pump repairs may cost $100-$300 or more.
10. Can a faulty additive level sensor trigger code P1935 on a Mercury?
Yes, a malfunctioning additive level sensor is a common cause of the P1935 code.
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