What does the P0006 code mean?
The P0006 is a generic OBD-II (Onboard Diagnostics II) trouble code. Its official definition is “Fuel Shutoff Valve A Control Circuit Low“.
This code indicates that the vehicle’s Powertrain Control Module (PCM) or Engine Control Module (ECM) has detected an abnormally low voltage signal, typically a short to ground, in the control circuit for Fuel Shutoff Valve ‘A’. This valve is a critical safety and control component, often found in vehicles with Gasoline Direct Injection (GDI) systems, modern diesel engines (common rail), and bi-fuel (e.g., LPG/CNG) systems. Its primary function is to act as an electrically controlled shutoff, stopping fuel flow to the engine when the ignition is turned off. A “low circuit” condition means the control wire is likely shorted to ground, preventing the PCM from properly commanding the valve. The first step in diagnosis is always to use a professional obd2 scanner to confirm the code and check for related faults.
Symptoms of Error Code P0006
Signs of error P0006 may include:
- Illuminated Check Engine Light (MIL) or Malfunction Indicator Lamp.
- Engine starting difficulties or hard starting.
- Engine misfires, runs rough, or experiences unstable idle.
- Noticeable loss of engine power and poor performance.
- Decreased fuel efficiency.
- In rare cases, the engine may not start at all, or it may continue to run briefly after the ignition is turned off (run-on).
Main Causes of Error Code P0006
- Damaged Wiring: Frayed, cut, pinched, or melted wires in the control circuit causing a short to ground.
- Faulty Electrical Connector: Oxidized, loose, or corroded pins at the valve or PCM connector.
- Internal Short in Fuel Shutoff Valve Solenoid: The valve itself has failed, creating an internal short circuit to ground.
- Blown Fuse: A blown fuse protecting the fuel shutoff valve control circuit.
- Failing Powertrain Control Module (PCM): A rare internal fault in the PCM’s driver circuit.
How to Diagnose Error Code P0006?
- Safety First: Disconnect the negative battery terminal. For any fuel system work, consult the service manual for proper depressurization procedures.
- Use an advanced obd2 code scanner to confirm code P0006 is present and active. Check for any related codes (like P0005 or P0007) and note the freeze frame data.
- Perform a thorough visual inspection of the entire wiring harness and connectors leading to the Fuel Shutoff Valve (common locations: on the high-pressure fuel pump, fuel rail, or near the fuel filter). Look for physical damage, chafing, or signs of heat exposure.
- Inspect Electrical Connectors: Carefully disconnect the valve connector and the corresponding PCM connector. Check for corrosion, bent pins, moisture, or poor terminal tension. Clean with electrical contact cleaner if necessary.
- Test the Circuit and Component (with battery disconnected):
- Disconnect the fuel shutoff valve’s electrical connector.
- Using a digital multimeter, measure the resistance across the two terminals of the valve solenoid. Compare to manufacturer specifications (often between 5 and 20 ohms). A reading significantly lower than spec or near 0 ohms indicates an internal short.
- With the valve connector still disconnected, check for continuity between the control wire (at the harness side) and chassis ground. If there is continuity (beep), it confirms a short to ground in the wiring harness.
- Check the relevant fuse in the engine bay fuse box using a multimeter’s continuity setting.
- If the wiring and fuse test good, but the valve resistance is incorrect, the Fuel Shutoff Valve is faulty and requires replacement.
- If the wiring has a short to ground, repair or replace the affected section of the harness.
Diagnostic Table: Possible Causes and Checks
| Possible Cause | How to Check? |
| Short to Ground in Wiring | Test for continuity between the control circuit wire (harness side, disconnected from valve) and chassis ground. Continuity indicates a short. |
| Faulty Fuel Shutoff Valve | Measure resistance at the valve terminals. A reading near 0 ohms confirms an internal short circuit. |
| Corroded or Damaged Connector | Visual inspection for green/white corrosion, bent pins, or cracked housing. Check terminal tension. |
| Blown Fuse | Locate the fuse for the fuel shutoff valve circuit (check owner’s manual) and test for continuity. |
| Faulty PCM Driver | Last resort. If wiring and valve are perfect, use an oscilloscope to check for a proper control signal from the PCM. No signal may indicate PCM failure. |
Tools needed: A quality OBD2 scanner or car code reader, a digital multimeter, basic hand tools, electrical contact cleaner, and vehicle-specific wiring diagrams.
How do I fix error code P0006? (Solutions to the Problem)
Simple Fixes
- Replace a blown fuse: If found, replace with a fuse of the exact same amperage rating. Investigate why it blew to prevent recurrence.
- Repair damaged wiring or clean connectors: For a shorted wire, repair using solder and heat-shrink tubing. For corrosion, clean terminals thoroughly and apply dielectric grease.
In-depth Diagnosis and Repair Solutions
- Replace the faulty Fuel Shutoff Valve: This is a common repair. Use an OEM or high-quality equivalent part. Always follow proper fuel system safety procedures (depressurization) before replacement.
- Repair or replace the wiring harness section: For extensive wire damage or a hard-to-locate short, replacing the harness section is the most reliable long-term fix.
- Address PCM issues: If all other components and wiring check out perfectly, the PCM may need reprogramming (software update) or replacement, which requires professional equipment and coding.
- After any repair, clear all codes with your car code scanner or obd code reader. Perform a test drive that includes several ignition cycles, then re-scan to ensure the P0006 code does not return.
Common Error Code P0006 in Vehicles
General Motors (Duramax Diesel L5P, LML; EcoTec3 5.3L/6.2L V8): Common in Chevrolet Silverado 2500/3500, GMC Sierra HD, Cadillac Escalade. On Duramax diesels, the Fuel Control Actuator (FCA) on the CP4 high-pressure pump can develop internal shorts. On gasoline trucks with Active Fuel Management (AFM), wiring to the fuel management solenoids can chafe and short.
Ford (Power Stroke Diesel 6.7L; EcoBoost 2.7L, 3.5L): Seen in F-250/F-350 Super Duty, F-150, Ford Transit. In the 6.7L Power Stroke, the Fuel Pressure Control Valve (FPCV) circuit is prone to shorts, especially where wiring passes near hot components. EcoBoost engines may have issues with the fuel pressure sensor or control valve circuits.
Ram/Cummins (6.7L Cummins Turbo Diesel): In Ram 2500/3500 models, P0006 often relates to the Fuel Control Actuator (also called the Fuel Metering Valve) on the CP3 or CP4 pump. Wiring insulation can degrade from engine heat, leading to shorts.
Volkswagen/Audi Group (2.0L TSI, 3.0L TFSI, 2.0L/3.0L TDI): In VW Golf, Audi A4, Q7, Porsche Macan. The fuel pressure regulator valve (N276) or the fuel pressure control valve circuit is a known point of failure. Connectors can suffer from moisture intrusion. Diagnosis is best performed with VCDS or ODIS.
BMW (N47/N57 Diesel, B48/B58 Gasoline): In BMW 328d, 535d, X5 35d, and gasoline models like the 340i. For diesel engines, the quantity control valve (QCV) on the high-pressure fuel pump can short internally. On gasoline engines, the high-pressure fuel system’s electronic pressure control valve is the suspect component.
Mercedes-Benz (OM642 3.0L V6 Diesel, OM651 2.1L I4 Diesel): In Mercedes Sprinter, E-Class, ML350. The fuel quantity control valve (Y94) on the high-pressure pump is a common failure item. The wiring harness, especially near the engine block, can also develop shorts due to vibration and heat.
Toyota/Lexus (1KD-FTV, 2GD-FTV D-4D Diesel): In Toyota Hilux, Land Cruiser Prado, Lexus IS 220d. The Suction Control Valve (SCV) on the fuel pump is notorious for electrical failures, including internal shorts that trigger P0006.
Honda/Acura (Earth Dreams 1.5L Turbo, 2.0L Turbo): In Honda Civic, CR-V, Accord. While less frequent, P0006 can appear in direct injection engines. Focus on the high-pressure fuel pump control solenoid and its wiring.
Nissan/Infiniti (VR30DDTT 3.0L Twin-Turbo, VQ37VHR): In Infiniti Q50, Nissan 370Z. For direct injection gasoline engines, inspect the circuits for the high-pressure fuel sensor and the fuel pressure control valve for shorts.
Subaru (FA20/FB25 DIT Turbo): In Subaru WRX, STI, Ascent. The fuel pressure control solenoid valve circuit can develop shorts, especially where the wiring routes near the turbocharger heat shield.
Mazda (Skyactiv-G 2.5T Turbo): In Mazda CX-5, CX-9, Mazda3 Turbo. The high-pressure fuel pump’s control valve circuit is critical. Mazda’s proprietary M-MDS diagnostics can command the valve for testing.
Hyundai/Kia (Smartstream G1.6T/G2.5T, CRDi Diesel): In Hyundai Sonata, Kia Sorento, Telluride. P0006 can be set by a short circuit in the Fuel Pressure Control Valve (FPCV) solenoid wiring or a failed valve.
Stellantis (Jeep 3.0L EcoDiesel, Ram 1500): In Jeep Grand Cherokee, Ram 1500 with the 3.0L diesel. Issues are similar to the Ram HD trucks, focusing on the fuel metering valve and its harness.
Volvo (VEA Diesel and Gasoline Engines): In Volvo XC60, XC90. The fuel pressure control valve is part of the high-pressure pump assembly. Wiring issues and valve failures are documented.
Land Rover (Ingenium Diesel, AJ-V8 Gasoline): In Range Rover Sport, Discovery. Known for complex electrical systems. Diagnosis requires checking not just the valve but also related control modules and ensuring all system grounds are perfect to rule out false shorts.
Isuzu (4JJ1, 4HK1 Diesel Trucks): In Isuzu D-Max, NPR commercial trucks. The fuel metering valve control circuit is a service item. A short to ground will prevent proper engine operation.
Mitsubishi (4N1 2.2L Diesel): In Mitsubishi Outlander, ASX (Outlander Sport). The fuel suction control valve circuit on the common rail pump can develop shorts.
P0006 Frequently Asked Questions
What is the first thing I should do when I see code P0006?
Use a reliable obd2 scanner to confirm the P0006 code is present and active. Then, safely disconnect the battery and perform a detailed visual inspection of all wiring and connectors associated with the fuel shutoff valve, which is often located on or near the high-pressure fuel pump. Check the relevant fuse first, as it’s the simplest and quickest potential fix.
Is it safe to drive my car with the P0006 code?
No, it is not recommended. The most likely symptom is a no-start condition, which could leave you stranded. If the vehicle does start, it may stall unexpectedly, creating a dangerous situation in traffic. Furthermore, the fuel shutoff system is a critical safety feature; driving with a known fault in this circuit is unwise.
How much does it typically cost to repair a P0006 error?
Costs vary significantly: Diagnostic fee: $100 – $200. A new Fuel Shutoff Valve: $150 – $500 depending on the vehicle. Labor for replacement: 1.5 – 3 hours ($150 – $450). Wiring harness repair: $200 – $400. If the PCM needs replacement: $800 – $2,500+. Total repair costs typically range from $300 for a simple wiring fix to over $3,000 for a complex repair on a luxury vehicle.
Can I replace the fuel shutoff valve myself to fix P0006?
This is an intermediate to advanced repair. It requires working on the fuel system, which is often under extremely high pressure (over 2,000 psi/138 bar). You MUST follow the manufacturer’s procedure to safely depressurize the system before disconnecting any lines. If you are not comfortable with fuel system work and electrical diagnostics, this job is best left to a professional technician.
Will disconnecting the battery clear the P0006 code?
Disconnecting the battery may temporarily clear the code and turn off the Check Engine Light. However, if the underlying electrical fault (like a shorted wire or failed valve) is still present, the code will return as soon as the PCM runs its self-tests, usually within one or two drive cycles. A proper fix requires addressing the root cause.
What’s the difference between P0005, P0006, and P0007?
All three codes relate to Fuel Shutoff Valve ‘A’. P0005 = “Control Circuit/Open” (a break in the circuit). P0006 = “Control Circuit Low” (a short to ground). P0007 = “Control Circuit High” (a short to voltage or an open circuit with a pull-up resistor). P0006 specifically indicates a path to ground where there shouldn’t be one.
My car passed its state inspection with the Check Engine Light on for P0006. Is that okay?
In most U.S. states and regions with emissions testing, an illuminated Check Engine Light (MIL) is an automatic failure. The vehicle should not pass inspection with an active P0006 code, as it indicates a fault in the emissions-related fuel control system.
After fixing the wiring or replacing the valve, do I need a special tool to reset the light?
Yes. You will need an OBD2 scanner, car code reader, or obd code reader with the ability to clear powertrain (P) codes. Most basic code readers have a “clear codes” or “erase DTCs” function. After clearing, the light should turn off immediately if the repair was successful.
Could a blown fuse really cause the P0006 code?
Yes, absolutely. A blown fuse creates an open circuit. While P0006 specifically indicates a “low” circuit (short to ground), the PCM’s monitoring logic can sometimes interpret a complete loss of circuit continuity (due to a blown fuse) as an out-of-range low signal, especially if there are pull-down resistors in the circuit. Always check the fuse.
How critical is it to use OEM parts for the Fuel Shutoff Valve repair?
For critical fuel system and safety components like the fuel shutoff valve, using genuine OEM or high-quality, certified OEM-equivalent parts is highly recommended. These components have precise electrical specifications and flow rates. Aftermarket parts of questionable quality may not meet these specs, leading to poor performance or a quick return of the fault.
My code is intermittent – the light comes on and off. What does that mean?
An intermittent P0006 almost always points to a wiring problem rather than a failed component. A wire may be frayed, making intermittent contact with ground when the vehicle vibrates or goes over bumps. A connector may be loose. Diagnosis involves carefully wiggling wires and connectors while monitoring the code status or related live data parameters with your obd2 code scanner.
Can a clogged fuel filter cause a P0006 code?
Highly unlikely. A clogged fuel filter is a mechanical restriction that affects fuel pressure and flow, potentially causing codes like P0087 (Fuel Rail/System Pressure Too Low). P0006 is strictly an electrical fault code for a specific control circuit. They are in completely different diagnostic categories.
What tools do I absolutely need to diagnose P0006 myself?
At a minimum: A capable OBD2 scanner or car code scanner to read/clear codes and view live data. A high-quality digital multimeter for measuring resistance, continuity, and voltage. Basic hand tools (wrenches, screwdrivers). Electrical contact cleaner. For advanced diagnosis, an oscilloscope is helpful but not essential for most DIYers.
Why is P0006 considered a “short to ground” code?
In automotive electrical diagnostics, a “low” circuit condition for a control output from the PCM means the voltage on that wire is being pulled down towards 0 volts (ground). This happens when there is an unintended electrical path (a “short”) between the control wire and the vehicle’s chassis or ground wire. The PCM detects this because it expects to see a certain voltage level when it tries to command the valve.
My scan tool shows “P0006 – Fuel Shutoff Valve A Control Circuit Low”. Does this always mean the valve is bad?
No. While a failed valve with an internal short is a common cause, wiring problems are equally, if not more, likely. A pinched wire, corroded connector creating a path to ground, or a damaged harness will produce the exact same code. Proper step-by-step electrical diagnosis is essential to avoid unnecessary and costly part replacement.
P0006 Related OBD2 Errors
- P0005: Fuel Shutoff Valve A Control Circuit/Open
- P0007: Fuel Shutoff Valve A Control Circuit High
- P0008: Fuel Shutoff Valve B Control Circuit/Open
- P0009: Fuel Shutoff Valve B Control Circuit Low
- P0010: Fuel Shutoff Valve B Control Circuit High
- P0087: Fuel Rail/System Pressure – Too Low
- P0190: Fuel Rail Pressure Sensor Circuit Malfunction
- P0191: Fuel Rail Pressure Sensor Circuit Range/Performance
- P0192: Fuel Rail Pressure Sensor Circuit Low Input
Important Safety Warning: The modern fuel system, especially in GDI and diesel applications, operates under extremely high pressure (often exceeding 2,000 psi / 138 bar). Always consult the vehicle’s service manual and follow the manufacturer’s specific procedure to safely depressurize the fuel system before attempting any disassembly or component replacement. If you are not confident in your skills or lack the proper tools, consult a qualified automotive technician. Ignoring a P0006 code can lead to a no-start condition, unsafe vehicle operation, or further damage to expensive fuel system components.