P0454
EVAP System Pressure Sensor/Switch A Circuit Intermittent
P0454 is an OBD-II diagnostic trouble code meaning: EVAP System Pressure Sensor/Switch A Circuit Intermittent. Common causes: open or shorted sensor wiring harness, poor contact in sensor/ecu connectors. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine idling
- Smell of gasoline in/near the car
Causes
- Open or shorted sensor wiring harness
- Poor contact in sensor/ECU connectors
- EVAP system pressure sensor malfunction
- Leakage in the EVAP system (cracked hoses, leaking valves)
- Damaged or loose fuel cap
How to Fix
- Check the tightness of the fuel tank cap
- Visually inspect the sensor wiring harness and connectors for damage.
- Check the resistance and continuity of the sensor circuit
- Check supply voltage and sensor signal
- Test the EVAP system for leaks (with a smoke machine or scanner)
- If necessary, replace the EVAP system pressure sensor
Related codes
Error P0454 by Vehicle Brand
FAQ
What does the P0454 code mean?
P0454 is an OBD-II diagnostic trouble code that indicates: EVAP System Pressure Sensor/Switch A Circuit Intermittent
What causes a P0454 error code?
The most common causes of P0454 include: Open or shorted sensor wiring harness; Poor contact in sensor/ECU connectors; EVAP system pressure sensor malfunction; Leakage in the EVAP system (cracked hoses, leaking valves).
How do I fix a P0454 diagnostic trouble code?
To fix P0454: Check the tightness of the fuel tank cap. Visually inspect the sensor wiring harness and connectors for damage.. Check the resistance and continuity of the sensor circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0454?
Limited driving only, diagnose soon
How much does it cost to fix P0454?
The estimated repair cost for P0454 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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