Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is getting a signal that the temperature sensor for the fuel rail is reading too low. It's like a thermometer saying it's really cold when it shouldn't be.
The P01B6 code indicates that the signal from the alternative fuel rail temperature sensor is lower than the expected range.
The alternative fuel rail temperature sensor measures the temperature of the fuel in the rail. If the sensor's signal is too low, it may mean the sensor is malfunctioning, the wiring is faulty, or there's a problem with the connection.
• Check Engine Light is on
• Poor fuel efficiency
• Engine performance issues
• Faulty alternative fuel rail temperature sensor
• Wiring issues such as shorts or open circuits
• Poor electrical connection at the sensor
Fuel Rail: A pipe that delivers fuel to the engine's fuel injectors.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the sensor.
• Test the sensor with a multimeter for proper resistance.
• Replace the faulty sensor.
• Repair or replace damaged wiring.
• Ensure all connections are clean and secure.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance checks
• Inspect wiring for wear and tear
• Ensure sensors are functioning properly
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Do not ignore the issue as it can affect fuel efficiency.
Sensor issues may be covered under the vehicle's powertrain warranty.
This code has been associated with hybrid and alternative fuel vehicles due to the specific sensor involved.
Moderate – While the vehicle may still run, it can lead to inefficient fuel use and potential engine issues.
Driving with a malfunctioning fuel temperature sensor can lead to increased emissions and potential safety risks.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The alternative fuel rail temperature sensor is typically located on or near the fuel rail.
Q: Can I drive with a P01B6 code?
A: It's possible to drive, but it's not recommended as it can lead to poor fuel efficiency and engine performance.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can reset the light using an OBD-II scanner after ensuring the problem is resolved.
Budget · Bluetooth scanner
An app-based scanner with repair reports and enhanced system diagnostics on supported vehicles.
Helpful when live data and repair-report guidance can narrow down a drivability issue.
View on Amazon
Specialty · Fuel pressure tester
Helpful for no-start, lean, rich, injector, and fuel-delivery diagnosis.
Useful for checking whether fuel delivery is contributing to the fault.
View on Amazon
Specialty · Compression tester
Useful when misfire, mechanical condition, or low-cylinder-pressure problems are suspected.
Helpful when you need to rule out low compression or mechanical engine problems.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.