Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system that prevents gas fumes from escaping. This code means there's a problem with a sensor that checks the pressure in that system.
The P147C code is triggered when the Engine Control Module (ECM) detects a mechanical issue with the EVAP system pressure sensor or switch.
The EVAP (Evaporative Emission Control) system prevents fuel vapors from escaping into the atmosphere. The pressure sensor or switch monitors the system's pressure to ensure it is functioning correctly. A mechanical issue with this sensor can lead to incorrect readings, causing the ECM to log the P147C code.
• Check Engine Light is on
• Increased emissions
• Possible fuel smell
• Faulty EVAP pressure sensor
• Damaged or disconnected wiring
• Mechanical failure in the sensor or switch
EVAP: Evaporative Emission Control
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the EVAP pressure sensor for damage.
• Check wiring and connections for faults.
• Replace the faulty EVAP pressure sensor.
• Repair or replace damaged wiring.
• Ensure all connections are secure.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $300
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly inspect EVAP system components.
• Ensure all connections are tight.
• Use quality fuel to prevent contamination.
Sensor Issue
• Have a professional inspect your vehicle if you're not comfortable with car repairs.
• Avoid driving with a persistent Check Engine Light.
Check your vehicle's warranty for coverage on emission-related components.
The P147C code has been reported in various models since the implementation of stricter emission standards.
Moderate – It should be addressed soon to ensure proper vehicle operation and emissions compliance.
Ignoring emission-related codes can lead to increased pollution and may violate local emissions laws.
• Engine running
• Vehicle at operating temperature
The EVAP pressure sensor is typically located near the fuel tank or in the engine bay.
Q: Can I drive with a P147C code?
A: It's possible to drive short distances, but it's best to fix it soon to avoid further issues.
Q: Will a P147C code affect my car's performance?
A: It may not affect immediate performance, but it can increase emissions and lead to other problems.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.