P0450low severityPowertrain
Evaporative Emission System Pressure Sensor/Switch Malfunction
on 2000 BMW 528i 2.8L I6 M52 · RWD
What this code means
The PCM detected a fault with the EVAP pressure sensor or switch. This can prevent accurate monitoring of fuel vapor system pressure.
Symptoms
- Check engine light on
- Failed emissions test
- No driveability change
Common causes
- Faulty EVAP pressure sensor
- Wiring or connector fault
- Damaged fuel tank or vapor lines
- Failed PCM input circuit
Diagnostic steps
- Retrieve code and freeze frame
- Inspect pressure sensor wiring
- Test sensor signal and reference voltage
- Verify EVAP system integrity
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Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1