P2067 — Fuel Level Sensor “B” Circuit Low #

Note: The official code title may differ depending on the vehicle manufacturer. Always refer to your OEM service documentation for the most accurate description.

• Fuel Level Sensor “B” Circuit Low (GM, Ford, Chrysler, Toyota, Honda, etc.)
• Fuel Sending Unit “B” Circuit Low Input (Nissan)
• Fuel Gauge Sensor “B” Low Voltage (Volkswagen / Audi)

Summary of Code P2067 #

The P2067 code indicates that the vehicle’s engine control module (ECM) or powertrain control module (PCM) has detected a low voltage condition in the circuit related to fuel level sensor “B”. This sensor is typically located inside the fuel tank and monitors the level of fuel, sending an electrical signal to the ECM. The “B” designation means this is the second sensor, often used for dual-tank or split-tank fuel systems, or for enhanced accuracy. If the signal drops below a certain voltage threshold, the ECM flags the P2067 code and illuminates the check engine light. This code can affect fuel gauge accuracy, trip computer calculations, and, in rare cases, engine operation on some advanced vehicles.

Common Symptoms for Code P2067 #

When the P2067 code is set, you might notice several symptoms, ranging from subtle gauge issues to more noticeable drivability concerns, depending on your vehicle’s design. Some drivers might only see a check engine light, while others will find their fuel gauge acting erratically. Here are the most typical signs:

• Check engine light illuminated on the dashboard.
• Fuel gauge stuck at empty or full, or fluctuating abnormally.
• Inaccurate range or distance-to-empty calculations.
• Low fuel warning light on, even with a full tank.
• Possible stalling or refusal to start if the vehicle uses fuel level data for system logic (less common).

Probable Causes for Code P2067 #

Several factors can trigger a P2067, but some are more common than others. The issue may be as simple as a loose connector or as complex as a failed sensor inside the tank. Below are the most frequent causes, ordered by likelihood:

1. Faulty fuel level sensor “B” (internal failure or wear)
2. Open or shorted wiring in the fuel sensor “B” circuit (corrosion, chafing, breaks)
3. Loose, corroded, or damaged connector at the fuel tank or PCM/ECM
4. Damaged fuel sending unit assembly (includes float mechanism and sensor)
5. PCM/ECM malfunction or software issue (rare)
6. Poor grounding in the circuit (rust, loose bolts, etc.)

Step-by-Step Diagnosis for Code P2067 #

Diagnosing a P2067 requires a systematic approach, as the root cause can be electrical, mechanical, or even software-related. Here’s how a professional technician would typically proceed:

• Read and record all stored codes with a scan tool. Check for related codes (P0462, P0463, etc.).
• Inspect the fuel gauge operation and note any irregularities.
• Visually inspect wiring and connectors at the fuel tank, sensor, and PCM for damage, corrosion, or loose connections.
• Test the fuel level sensor “B” circuit with a multimeter—check for continuity, resistance, and proper ground.
• Backprobe the signal wire to verify voltage is within OEM specifications (typically 0.5V to 4.5V, check your manual).
• Check the sensor’s resistance (with the tank emptied and filled if possible) to confirm it changes as expected.
• Clear the code and retest after any repairs or adjustments to confirm resolution.

Possible Repairs for Code P2067 #

Depending on the underlying cause, resolving P2067 may be straightforward or require more in-depth work. Always address the root issue to prevent recurrence. Typical fixes include:

• Replacing the faulty fuel level sensor “B” (often part of the fuel pump or sending unit assembly)
• Repairing or replacing damaged wiring or connectors in the relevant circuit
• Cleaning corroded contacts or improving ground connections
• Reprogramming or updating the PCM/ECM software (only if guided by OEM technical service bulletins)
• Replacing the entire fuel sending unit if the float or mechanism is jammed or broken

Can You Drive with Code P2067? #

Yes, but with limitations: Most vehicles with P2067 will still run and drive normally, as this code typically does not affect engine performance. However, your fuel gauge may be inaccurate or inoperative, increasing the risk of running out of fuel unexpectedly. If your vehicle uses fuel level data for emissions control or hybrid system logic, additional warning lights or drivability concerns may develop. It’s best to repair the issue soon to avoid roadside surprises.

Vehicles Most Commonly Affected by Code P2067 #

While P2067 can appear on any OBD-II-equipped vehicle, it’s most frequently reported on models that use dual fuel level sensors or advanced fuel management systems. The following makes and models are known to experience this code more often:

• Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon (especially with large or split fuel tanks)
• Ford F-Series and Super Duty trucks
• Toyota Tundra, Sequoia, and Land Cruiser
• Nissan Armada, Titan
• Ram 1500/2500/3500 (especially diesel models)
• Volkswagen Touareg, Audi Q7

Common Mistakes & Best Practices for Code P2067 #

Misdiagnosing P2067 is not uncommon, especially if the technician skips crucial steps or assumes the sensor is always at fault. Here’s what to watch out for, and how to do it right:

• Replacing the sensor without checking wiring—many issues are caused by corroded or broken wires, not the sensor itself.
• Overlooking poor ground connections—ensure all grounds in the circuit are clean and secure.
• Ignoring related codes—other codes (like P0462 or P0463) may provide additional clues.
• Not verifying repair—always clear codes and road-test to confirm the fix.
• Skipping OEM service bulletins—some models have known issues with specific year ranges and parts.

Quick FAQ for Code P2067 #

Got questions? Here are a few answers to the most common concerns:

• Q: Will P2067 cause my car to fail an emissions test?
  A: Usually not directly, but if the check engine light is on, your vehicle may automatically fail the inspection in many states.
• Q: Is it safe to drive with P2067 for a few weeks?
  A: As long as you monitor your fuel level carefully and don’t rely solely on the gauge, yes. But it’s wise to resolve the issue soon to avoid running out of gas.
• Q: Can I replace the fuel level sensor myself?
  A: If you’re comfortable working around the fuel system and have access to the tank, it’s possible. However, most sensors are integrated with the fuel pump module, requiring tank removal—professional help is recommended for most people.