EGR / EmissionsLow ImpactDiesel

P0405 — EGR Position Sensor Circuit Low

The EGR valve position sensor is reporting a voltage below the expected minimum.

5+

Affected Brands

10+

ECU Platforms

2

Related Services

5

Related DTCs

Symptoms

What the driver typically experiences when P0405 is stored

!Check Engine Light
iNo drivability impact

Why does P0405 appear after tuning?

Common companion code to P0401 when EGR system is deactivated without addressing sensor monitoring.

How proper calibration can address P0405

Included in WEREMAP EGR-off calibration packages with full sensor monitoring deactivation.

Related Tuning Services

Relevant services for the system behind P0405

EGR OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0405

P0403Low Impact

Exhaust Gas Recirculation (EGR) Control Circuit

P0406Low Impact

Diagnostic Trouble Code P0406

P0407Low Impact

Diagnostic Trouble Code P0407

P0401Low Impact

Exhaust Gas Recirculation (EGR) Flow Insufficient

P0400Low Impact

Exhaust Gas Recirculation Flow

Affected ECU Platforms

Bosch EDC17C79Delphi DCM6.2Siemens/Continental SID208Bosch EDC16C34Siemens/Continental SID201Bosch EDC17C50Bosch EDC17C73Bosch MD1CP002Delphi DCM3.5Bosch EDC17CP14

Commonly Affected Vehicles

VWTransporter / MultivanDelphi DCM6.2
MazdaBT-50Siemens/Continental SID208
VWTransporterDelphi DCM6.2
DodgeRamBosch EDC17C79
BMW1 SerieBosch EDC17C50
ToyotaRAV4Bosch EDC17C73
BMW5 SerieBosch MD1CP002

Based on data from 5+ vehicle brands. P0405 is not limited to these models.

Frequently Asked Questions

What does P0405 mean?â–¼
The EGR valve position sensor is reporting a voltage below the expected minimum.
Why does P0405 appear after ECU tuning?â–¼
Common companion code to P0401 when EGR system is deactivated without addressing sensor monitoring.
How do you prevent P0405 during remapping?â–¼
Included in WEREMAP EGR-off calibration packages with full sensor monitoring deactivation.
Which vehicles are affected by P0405?â–¼
P0405 is commonly found on VW, Mazda, Dodge, BMW, Toyota vehicles equipped with Bosch EDC17C79, Delphi DCM6.2, Siemens/Continental SID208, Bosch EDC16C34 ECU platforms.
What other codes appear alongside P0405?â–¼
P0405 frequently appears together with P0403, P0406, P0407, P0401, P0400. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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