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 has detected a problem with the performance of a specific fuel pump that is used for alternative fuels, like natural gas or ethanol.
The P2A90 code is triggered when the Engine Control Module (ECM) detects that the performance of the alternative fuel pump C is not within the expected parameters.
The alternative fuel pump C is responsible for delivering alternative fuels to the engine. When the ECM detects that the pump is not providing the correct pressure or flow rate, it triggers the P2A90 code. This could be due to mechanical failure, electrical issues, or blockages in the fuel line.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty alternative fuel pump C
• Clogged fuel filter
• Electrical issues such as a bad relay or wiring problem
ECM: Engine Control Module, the computer that controls engine functions.
Alternative Fuel: Fuels other than traditional gasoline or diesel, such as natural gas or ethanol.
• Use an OBD-II scanner to confirm the code.
• Inspect the fuel pump C and its connections.
• Check the fuel filter for blockages.
• Replace the alternative fuel pump C if faulty.
• Clean or replace the fuel filter.
• Repair any damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Fuel pressure gauge
$200 - $600
Moderate
• Toyota Prius
• Honda Civic Natural Gas
• Chevrolet Volt
• Regularly maintain the fuel system.
• Use high-quality alternative fuels.
• Replace fuel filters at recommended intervals.
Engine Performance
• Avoid driving with this code active to prevent further damage.
• Consult a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer; fuel system components may be covered under warranty.
This code is relatively uncommon and typically associated with vehicles that use alternative fuels.
Moderate – Addressing this issue is important to maintain vehicle performance.
Driving with a malfunctioning fuel pump can lead to engine damage or failure.
• Engine at operating temperature
• Vehicle running on alternative fuel
The alternative fuel pump C is typically located near the fuel tank or within the fuel tank assembly.
Q: Can I drive with a P2A90 code?
A: It's not recommended to drive with this code as it can lead to poor engine performance and potential damage.
Q: How can I prevent a P2A90 code?
A: Regular maintenance of the fuel system and using high-quality fuels can help prevent this code.
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