P1405 DPF EGR Sensor Circuit High Voltage Detected

Code: P1405

Description: DPF EGR sensor circuit high voltage detected.

Definition: This code indicates that the Diesel Particulate Filter (DPF) Exhaust Gas Recirculation (EGR) sensor is detecting a higher than expected voltage in its circuit, which may suggest an issue with the sensor or related components.

p1405 dpf egr sensor circuit high voltage detected

Typical severity: Powertrain – Moderate

Common Causes

p1405 – DPF EGR Sensor Circuit High Voltage Detected

Common Causes:

• Faulty DPF EGR sensor
• Short circuit in the sensor wiring
• Corrosion or poor connection in the sensor circuit
• Issues with the engine control module (ECM)

 

Common Misdiagnosis

OBD2 Code: P1405

Description: DPF EGR Sensor Circuit High Voltage Detected

Common Misdiagnosis: Replacing the EGR valve or sensor without checking for wiring issues or connector problems.

 

Common Diagnostic Steps

OBD2 Code: P1405

Description: DPF EGR Sensor Circuit High Voltage Detected

• Check the EGR sensor wiring and connectors for damage or corrosion.
• Inspect the EGR sensor itself for any signs of damage or malfunction.
• Test the voltage at the EGR sensor connector to ensure it is within specifications.
• Verify that there are no blockages in the exhaust gas recirculation system affecting sensor readings.
• Use a scan tool to monitor live data from the EGR sensor to check for irregularities.
• If necessary, replace the faulty EGR sensor with a new one and clear any stored codes.