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 found a problem with the sensor that checks the pressure in a special fuel tank. It's like when your toy's battery meter is broken and you don't know how much power is left.
The P2A46 code is triggered when the vehicle's engine control module (ECM) detects a malfunction in the circuit for the pressure sensor in the alternative fuel tank C.
The pressure sensor in the alternative fuel tank C is responsible for monitoring the pressure levels within the tank. This information is crucial for the ECM to manage fuel delivery and ensure optimal engine performance. A fault in this sensor circuit could lead to incorrect pressure readings, affecting engine efficiency and emissions.
• Check Engine Light is on
• Poor fuel economy
• Engine performance issues
• Faulty pressure sensor
• Wiring issues such as open or short circuits
• Corroded or damaged connectors
ECM: Engine Control Module, the computer that manages engine functions.
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnosis and reporting.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the pressure sensor with a multimeter to ensure it's functioning properly.
• Replace the faulty pressure sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, pliers)
$100 - $300
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regularly inspect and maintain fuel system components.
• Ensure connectors are clean and free from corrosion.
• Use quality fuel to prevent sensor contamination.
Sensor Issue
• Avoid driving long distances until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
Check your vehicle's warranty; sensor issues may be covered under emissions or powertrain warranty.
This code has been reported in hybrid and alternative fuel vehicles since the early 2010s, as these vehicles often have multiple fuel tanks and sensors.
Moderate – Addressing this issue promptly can prevent further engine performance problems.
Driving with a malfunctioning fuel sensor can lead to increased emissions and may not comply with local emissions regulations.
• Vehicle must be running.
• Fuel tank should have a moderate amount of fuel for accurate testing.
The pressure sensor for the alternative fuel tank C is typically located near or on the tank itself, often accessible from underneath the vehicle.
Q: Can I drive with the P2A46 code?
A: It's possible to drive short distances, but it's best to fix the issue soon to avoid engine performance problems.
Q: Will this code affect my car's emissions?
A: Yes, a faulty pressure sensor can lead to incorrect fuel delivery, affecting emissions.
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