The Lemon Index

Check engine light · Engine codes

P0405: Exhaust Gas Recirculation Sensor A Circuit Low.

Powertrain · GenericP0405
Drive on, get it checked
What it means

The EGR position sensor reads too low.

How serious

Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.

Where a shop starts

Failed EGR valve/sensor. Then: wiring fault.

Owners named P0405 in 11 complaints to the U.S. government, most often on the Chevrolet Volt.

Cars owners report it on

Complaints that name P0405, by model. Raw counts, not a failure rate: popular models get more complaints.

Years owners report it on most: 2017 Chevrolet Volt

The details

What P0405 means

The EGR position sensor reads too low.

Can I drive with P0405?

Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.

36% of the owner complaints that name P0405 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.

Common causes of P0405
  • Failed EGR valve/sensor
  • Wiring fault

A shop should confirm the cause with a scan and tests before replacing parts.

What owners describe
  • Stalls or shuts off: 36% of complaints
  • Loses power or goes into limp mode: 18% of complaints
  • Brakes or ABS act up: 18% of complaints
  • Warning lights and electrical faults: 18% of complaints

Share of complaints naming the code whose text also mentions each problem.

Model years that report P0405 most

2017 Chevrolet Volt (2).

Related codes

P0404 P0406 P0403 P0402 P0401 P0410 P0411 P0418

Quick answers

What does P0405 mean?

Exhaust Gas Recirculation Sensor A Circuit Low. The EGR position sensor reads too low.

Can I drive with P0405?

Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.

What causes P0405?

Failed EGR valve/sensor; Wiring fault.

Counts: NHTSA owner complaints whose text names P0405. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.

Updated · Free to use with credit: Source: The Lemon Index (lemonindex.com). Get the data

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