Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that a valve in the car that helps control fuel vapor is not closing properly. It's like a door that won't shut.
The Tank Shutoff Valve is responsible for closing off the fuel tank to prevent vapor from escaping. If it's stuck open, it can cause issues with the vehicle's emissions system.
The P148E code indicates that the Engine Control Module (ECM) has detected that the tank shutoff valve is not closing as it should. This valve is part of the evaporative emission control system, which prevents fuel vapors from escaping into the atmosphere. A malfunction can lead to increased emissions and may affect vehicle performance.
• Check Engine Light illuminated
• Increased fuel odor
• Possible decrease in fuel efficiency
• Faulty tank shutoff valve
• Electrical issue in the valve circuit
• Valve stuck due to debris or corrosion
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Perform a visual inspection of the tank shutoff valve and its connections.
• Use a diagnostic scanner to check for additional codes.
• Test the electrical circuit of the valve for continuity and proper voltage.
• Replace the faulty tank shutoff valve.
• Clean or repair any corroded connections in the valve circuit.
• Clear the code and test drive the vehicle to ensure the repair was successful.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Ensure fuel cap is properly sealed
• Avoid overfilling the fuel tank
Evaporative Emission System Issue
• Have the vehicle inspected by a professional mechanic.
• Do not ignore the Check Engine Light, as it may lead to more severe issues.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
This code has been more prevalent in vehicles with high mileage or those exposed to harsh environmental conditions.
Moderate – It should be addressed soon to prevent potential emissions problems.
Ignoring emissions-related issues can lead to failing emissions tests and potential fines in some regions.
• Vehicle at operating temperature
• Engine running at idle
The tank shutoff valve is typically located near the fuel tank or along the evaporative emission control system lines.
Q: Can I drive with a P148E code?
A: While the vehicle may still be drivable, it's important to fix the issue to avoid emissions problems and potential damage.
Q: Will a P148E code affect my fuel economy?
A: It might slightly decrease fuel efficiency due to improper vapor management.
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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.