Engine Error
P0405
Exhaust Gas Recirculation Sensor A Circuit Low
Severity
Medium
Symptoms
Engine pinging/knocking, rough idle, check engine light
Common Causes
- Short to ground in EGR sensor wiring
- Defective EGR valve position sensor
- EGR valve stuck closed
- Failed PCM
How to Fix
- 1 Trace and repair shorted wiring
- 2 Replace EGR position sensor or complete valve
- 3 Clean or replace stuck EGR valve
- 4 Test PCM reference voltage
Estimated Repair Cost
USD
$80
–
$350
EGR Valve/Sensor: $150 - $350