Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the switch that lets you choose between different fuel modes, like switching from regular to eco mode.
The P25A5 code is triggered when the vehicle's computer detects an issue with the performance of the fuel mode select switch.
The fuel mode select switch allows the driver to change the vehicle's fuel consumption mode, affecting engine performance and efficiency. The P25A5 code indicates that the switch is not performing as expected, which could be due to electrical or mechanical issues.
• Check Engine Light is on
• Inability to switch fuel modes
• Reduced fuel efficiency
• Faulty fuel mode select switch
• Wiring issues or short circuits
• Malfunctioning control module
OBD-II: On-Board Diagnostics, a system that monitors vehicle performance.
Fuel Mode: A setting that changes how the engine uses fuel for performance or efficiency.
• Check the vehicle's manual for the location of the fuel mode select switch.
• Inspect the switch for physical damage.
• Test the switch and related wiring for continuity and proper operation.
• Replace the faulty fuel mode select switch.
• Repair or replace damaged wiring.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Chevrolet Malibu
• GMC Sierra
• Cadillac CTS
• Regularly inspect and maintain vehicle wiring.
• Avoid harsh use of the fuel mode select switch.
• Schedule routine vehicle diagnostics.
Sensor Issue
• Avoid using the fuel mode select switch until repaired.
• Consult a professional mechanic for accurate diagnosis.
• Monitor fuel efficiency and performance.
Check with the vehicle manufacturer for warranty coverage on electrical components.
This code has been reported in vehicles with advanced fuel management systems, especially in models with multiple driving modes.
Moderate – While the vehicle may still operate, fuel efficiency and performance can be affected.
Driving with a malfunctioning fuel mode switch may lead to unexpected changes in vehicle performance.
• Vehicle ignition on
• Switch between fuel modes
The fuel mode select switch is typically located on the dashboard or center console.
Q: Can I drive with the P25A5 code?
A: Yes, but it's recommended to fix the issue soon to avoid performance problems.
Q: Will this code affect my fuel economy?
A: Yes, it might lead to reduced fuel efficiency if the vehicle is stuck in an undesired mode.
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