Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car has a part that helps control fuel vapors, and it's not working because the wires to it are broken or disconnected.
This code indicates that the circuit controlling the solenoid valve for running losses is open, meaning there is a break in the electrical connection.
The P1146 code is set when the Engine Control Module (ECM) detects an open circuit in the solenoid valve that manages running losses. This valve is part of the evaporative emissions system, which captures and recycles fuel vapors from the fuel tank.
• Check Engine Light is on
• Possible fuel odor
• Decreased fuel efficiency
• Damaged or disconnected wiring
• Faulty solenoid valve
• Blown fuse
Solenoid: A device that converts electrical energy into mechanical movement.
EVAP System: Evaporative Emission Control System, which prevents fuel vapors from escaping into the atmosphere.
• Inspect the wiring and connectors to the solenoid valve for damage.
• Check the solenoid valve for proper operation.
• Test the circuit for continuity.
• Repair or replace damaged wiring.
• Replace the solenoid valve if faulty.
• Replace any blown fuses.
• Multimeter
• OBD-II scanner
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Nissan Altima
• Honda Accord
• Regularly inspect and maintain the EVAP system.
• Ensure all connectors are secure.
• Check for recalls related to the EVAP system.
Sensor Issue
• Avoid overfilling the fuel tank.
• Have regular vehicle inspections.
• Address Check Engine Light warnings promptly.
Check with your vehicle manufacturer; emissions-related components may have extended warranties.
The P1146 code has been associated with issues in the evaporative emissions system, particularly in older models with wear and tear on wiring and connectors.
Moderate – While the vehicle may still run, emissions and fuel efficiency can be affected.
Driving with a malfunctioning emissions system can lead to increased pollution and may violate local emissions laws.
• Engine running
• Vehicle at operating temperature
The solenoid valve is typically located near the fuel tank or engine bay, part of the EVAP system.
Q: Can I drive with a P1146 code?
A: Yes, but it's best to fix it soon to avoid emissions issues and potential fuel efficiency loss.
Q: Will a P1146 code affect my car's performance?
A: It may not affect performance directly, but it can lead to increased emissions and reduced fuel efficiency.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.