What does fault code ECM-P00531E mean?

Diagnostic fault code details for ECM-P00531E (Volvo S60 (2011–), Volvo S60 (2011–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P00531E - HO2S Heater Resistance (Bank 1, Sensor 1). General Electrical Failures. Circuit resistance out of range

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

6 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–)

Show models by year and engine (11)

What does this fault code mean?

The engine control module finds that the control of the heater element in the front oxygen sensor on bank 1, sensor 1, has not worked for a certain period. The code belongs to electrical faults where the resistance is wrong.

Possible causes

Oxidised connectors with raised contact resistance
The front oxygen sensor is damaged

What you can do

1Make sure the fuses are intact. Their location is on the fuse chart or in the instruction manual
2Read the fault code with a diagnostic tool with the engine running and see whether it is active
3Check the connector on the front oxygen sensor for bank 1 sensor 1 for oxidation and contact resistance
4With a multimeter, check that the wiring to the sensor has no open circuit and no short to ground or supply
5Replace the front oxygen sensor if the fault remains after checking the connector and wiring
6Have a workshop with diagnostic equipment check the control of the heater element if the fault comes back

Symptoms you may notice1

The Check engine lamp lights up or behaves abnormally

General guidance for car owners. Diagnosis on the car can point to a different cause.