P0451low severityPowertrain
Evaporative Emission System Pressure Sensor/Switch Range/Performance
on 2018 Toyota Camry 2.5L I4 · FWD
What this code means
The PCM detected an erratic or out-of-range signal from the EVAP pressure sensor. This points to a sensor performance issue affecting vapor system monitoring.
Symptoms
- Check engine light on
- Failed emissions test
- No driveability symptoms
Common causes
- Faulty EVAP pressure sensor
- Loose or damaged fuel cap
- Wiring or connector fault
- Vapor line leak or restriction
Diagnostic steps
- Retrieve code and freeze frame
- Inspect fuel cap and vapor lines
- Monitor pressure sensor data
- Test sensor wiring and reference voltage
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1