AutoCodesFord – B1203 Ford

B1203 Ford Code - Fuel Sender Circuit Short To Battery

Quick Answer

The fuel pump module is hardwired to the Instrument Cluster (IC). Common causes include Faulty Fuel Level Sensor Unit, Fuel Level Sensor Unit harness is open or shorted, Fuel Level Sensor Unit 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
B1203 Ford indicates Fuel Sender Circuit Short To Battery.
Common causes
Common causes include Faulty Fuel Level Sensor Unit, Fuel Level Sensor Unit harness is open or shorted, Fuel Level Sensor Unit 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 14,061
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 19, 2024
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Code B1203 Ford Description

The fuel pump module is hardwired to the Instrument Cluster (IC). The fuel level sensor (part of the pump module) is a variable resistor actuated by a float with resistance ranging between 180 ohms ± 4 ohms at empty (E) to 10 ohms ± 2 ohms at full (F). The instrument cluster (IC) provides a reference voltage to the fuel pump module on the input circuit. As the fuel level changes, the fuel level sensor float moves up or down according to the fuel level altering the fuel level signal voltage through the resistor. The instrument cluster (IC) interprets this signal and commands the fuel gauge pointer to sweep to the correct level.
OBDII Code B1203 Ford - Fuel Sender Circuit Short To Battery - AutoCodes.com
B1203 Ford Code - Fuel Sender Circuit Short To Battery

What are the Possible Causes of the DTC B1203 Ford?

  • Faulty Fuel Level Sensor Unit
  • Fuel Level Sensor Unit harness is open or shorted
  • Fuel Level Sensor Unit circuit poor electrical connection

How to Fix the DTC B1203 Ford?

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 B1203 Ford 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.

Need more information about the B1203 Ford code?

Need more information on how to fix the B1203 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1203 Ford code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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.

Frequently Asked Questions about B1203 Ford Code

1. What are common symptoms of OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Common symptoms include inaccurate fuel gauge readings, erratic fuel level fluctuations, and illuminated fuel gauge warning lights.

2. What are the possible causes of OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Possible causes include a short circuit in the fuel sender circuit, faulty wiring or connectors, or a defective fuel level sensor.

3. How can I diagnose the issue related to OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Diagnose the issue by checking the wiring and connectors for any visible damage, testing the fuel level sensor resistance, and using a multimeter to check for short circuits.

4. Can a DIY enthusiast repair OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- While some DIY enthusiasts may be able to repair this issue by replacing faulty components, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Is it safe to continue driving with OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- It is not recommended to continue driving with this code as it can lead to inaccurate fuel level readings, potentially causing you to run out of fuel unexpectedly.

6. How much does it typically cost to repair OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- The cost of repair can vary depending on the extent of the damage and the specific components that need replacement, but it may range from $100 to $300 or more.

7. Are there any preventive measures to avoid OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Regularly checking the fuel gauge's accuracy, avoiding overfilling the fuel tank, and addressing any fuel system issues promptly can help prevent this code from occurring.

8. Can extreme weather conditions impact OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Yes, extreme temperatures or moisture exposure can potentially damage the fuel sender circuit components, leading to the occurrence of this code.

9. How long does it typically take to repair OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- The repair time can vary based on the complexity of the issue and the availability of replacement parts, but it may take a few hours to a full day for the repair to be completed.

10. Will resetting the OBDII system clear OBDII code B1203 Ford (Fuel Sender Circuit Short To Battery)?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

Discuss the causes and fixes for B1203 Ford OBDII Code

  • no acceleration for ford exploler 2007yrs i changed throttle body & injector already but comes obd2 code b1203 i checked fuel pump good working but not original.

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