B1D01 Ford Code - Headlamp Right Low Beam
Quick Answer
When the Body Control Module (BCM) receives a message that the headlamp switch is in the HEADLAMPS ON position and the multifunction switch is in the LOW BEAM position (or the autolamps feature has requested the headlamps on), the BCM provides voltage through the headlamp output circuits to the Left (LH) and Right (RH) low beam headlamps. Common causes include Faulty Headlamp Right Low Beam, Headlamp Right Low Beam harness is open or shorted, Headlamp Right Low Beam 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
- B1D01 Ford indicates Headlamp Right Low Beam.
- Common causes
- Common causes include Faulty Headlamp Right Low Beam, Headlamp Right Low Beam harness is open or shorted, Headlamp Right Low Beam 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 B1D01 Ford Description
What are the Possible Causes of the DTC B1D01 Ford?
- Faulty Headlamp Right Low Beam
- Headlamp Right Low Beam harness is open or shorted
- Headlamp Right Low Beam circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1D01 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.
Code Tech Notes
B1D01:15 Right Low Beam Circuit Short to Battery or Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1D01 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.
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Frequently Asked Questions about B1D01 Ford Code
1. What are the common symptoms of OBDII code B1D01 for the right low beam headlamp in a Ford vehicle?
The common symptoms include the right low beam headlamp not working or flickering intermittently.
2. What are some possible causes of OBDII code B1D01 for the right low beam headlamp in a Ford?
Possible causes may include a faulty headlamp bulb, a damaged wiring harness, a defective headlamp control module, or a problem with the vehicle's body control module.
3. How can I diagnose the issue related to OBDII code B1D01 for the right low beam headlamp in my Ford?
You can start by visually inspecting the headlamp bulb and wiring for any visible damage. Using a multimeter, you can also test the continuity of the wiring and check for power at the headlamp connector.
4. Is it possible to repair OBDII code B1D01 for the right low beam headlamp in a Ford without professional help?
Depending on your level of automotive knowledge and experience, you may be able to replace the headlamp bulb or repair minor wiring issues yourself. However, more complex issues may require professional diagnosis and repair.
5. Can a loose connection cause OBDII code B1D01 for the right low beam headlamp in a Ford?
Yes, a loose or corroded connection in the headlamp circuit can cause the right low beam headlamp to malfunction and trigger this OBDII code.
6. Will resetting the OBDII code B1D01 for the right low beam headlamp in a Ford fix the issue?
Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the right low beam headlamp problem. It's important to diagnose and address the root cause of the code.
7. Should I replace both headlamp bulbs if OBDII code B1D01 is detected for the right low beam headlamp in my Ford?
It is not necessary to replace both headlamp bulbs unless the left low beam headlamp is also showing signs of failure. Focus on diagnosing and resolving the specific issue with the right low beam headlamp.
8. Can extreme weather conditions affect the right low beam headlamp and trigger OBDII code B1D01 in a Ford vehicle?
Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can potentially cause damage to the headlamp components or wiring, leading to issues with the right low beam headlamp.
9. Are there any safety concerns associated with driving with OBDII code B1D01 for the right low beam headlamp in a Ford?
Driving with a malfunctioning headlamp can reduce visibility, especially at night or in poor weather conditions, potentially compromising safety. It is recommended to address the issue promptly to ensure optimal visibility on the road.
10. How much does it typically cost to repair OBDII code B1D01 for the right low beam headlamp in a Ford at a professional auto repair shop?
The cost of repair can vary depending on the exact cause of the issue and the labor rates of the repair shop. Replacing a headlamp bulb may be relatively inexpensive, while repairing or replacing control modules or wiring harnesses can be more costly.
Discuss the causes and fixes for B1D01 Ford OBDII Code
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Cuando no encendía la luz de cruce derecha lo solucionaba conectando el scaner y borrando la falla (fugitiva) que quedaba grabada. Ahora no la puedo borrar porque la falla es permanente según el scaner.
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I have a B1d00:15:48 DTC on mt 2020 f350. What is the recommend procedure to repair?
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On a 2020 F-350, B1D00:15:48 means the body control module is seeing a circuit problem with the headlamp — usually an open or short in the low beam circuit.
The “:15” typically points to a short to battery or open condition, and the “:48” indicates the fault is currently active.
On these Super Duty trucks, especially if equipped with factory LED headlights, the lights are module-controlled. It’s not just a simple bulb and fuse like older trucks.
Here’s the order I’d diagnose it:
- Verify whether the right low beam is actually not working.
- Inspect the headlamp connector for corrosion, moisture, or bent pins.
- Check for damage in the harness near the headlight area — these trucks see a lot of front-end vibration and water intrusion.
- If it has halogen bulbs, check the bulb and related fuse first.
- If it has factory LED assemblies, the entire headlamp unit may be the issue — internal driver circuits can fail.
If the code is active and the light is out, most of the time it ends up being:
- A failed LED headlamp assembly, or
- A wiring issue near the headlamp connector.
Before replacing anything expensive, I’d confirm power and ground at the headlamp connector with a test light or meter. If power and ground are present and the light doesn’t work, the headlamp assembly is usually the culprit.
If the truck has had front-end work, grille removal, or minor collision repair, I’d inspect wiring very closely.
If you can confirm whether it’s LED or halogen, that narrows it down even more.
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Just to clarify for anyone following along — the code discussed above (B1D00) refers to the left headlamp circuit.
This page is for B1D01, which is the right headlamp low beam circuit. The diagnosis process is the same, but the side of the vehicle changes depending on whether the code ends in 00 (left) or 01 (right).
So if your scan tool is showing B1D00, you’ll want to focus on the left headlamp. If it shows B1D01, then it’s the right side.
Ford’s numbering can be confusing, so it’s always good to double-check the exact code suffix before ordering parts.
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I have a 2020 F350 Platinum with the following code: U3002:62:AB
What is the recommended fix?-
You’re correct — on the Super Duty trucks B1D00 typically refers to the left headlamp circuit. Ford’s numbering can be a little confusing because “right” and “left” are referenced from the driver’s seat. So yes, on your 2020 F-350 that code is pointing to the left low beam circuit.
The diagnostic approach stays the same:
• Verify the left low beam operation
• Inspect the connector for moisture or bent pins
• Check the harness near the headlamp
• If factory LED, the headlamp assembly itself is commonly the failure pointNow regarding your second code:
U3002:62:AB is a control module power supply voltage fault. The “:62” indicates the module is seeing voltage that is too low. The “:AB” just means the fault is currently active or stored.
On these trucks, U3002 almost always points to a low battery, weak battery under load, poor ground, or charging system issue. Even if the truck starts fine, voltage dips during startup can trigger that code.
Before replacing anything expensive, I would:
• Load-test both batteries (these trucks are very sensitive to battery condition)
• Check all battery terminals and grounds (frame and engine block)
• Verify alternator output under load
• Check for corrosion at the underhood fuse boxMany electrical and lighting codes on the 2020 Super Duty end up tracing back to voltage instability rather than failed modules.
If both codes are present at the same time, I would absolutely address the battery/voltage issue first before replacing a headlamp assembly.
Start with power supply health — these trucks don’t tolerate low voltage well.
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