P0452 - EVAP Pressure Sensor Low Input

EVAP pressure sensor signal low.

Code Overview

EVAP pressure sensor signal low.

Common Causes

• Fuel tank pressure sensor reading too low
• Short to ground in the EVAP pressure-sensor circuit
• Damaged wiring or poor terminal contact
• Sensor reference or ground fault in the EVAP circuit

Symptoms

• Check-engine light with no major drivability complaint
• EVAP monitor may not complete normally
• Possible emissions test failure

Diagnostic Steps

1. Inspect the EVAP pressure sensor connector and nearby wiring
2. Verify reference voltage, ground, and signal integrity at the sensor
3. Compare tank-pressure data to expected resting values on the scan tool
4. Check for related EVAP wiring or sensor faults before replacing the sensor

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

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