What does fault code ECM-P064D00 mean?

Diagnostic fault code details for ECM-P064D00 (Volvo C30 (2007–2013), Volvo S40 (2004–2013), Volvo S60 (2011–)). Repair service at OBD Tuning.

VOLVO

ECM-P064D00 - Internal Control Module O2 Sensor Processor Performance - Bank 1. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

10 models

C30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–), XC90 (2003–)

Show models by year and engine (11)

What does this fault code mean?

Although the code is named for processor performance of the bank 1 oxygen sensor, it concerns the signal to the control valve of the A/C compressor. The ECM checks the signal that drives the control valve (solenoid), and the code is set when the module detects an incorrect signal.

Possible causes

Open circuit in the signal wire
Open circuit in the voltage supply
Damaged control valve (solenoid)

What you can do

1Check that the fuses are intact
2Where possible, check the A/C function with the buttons or controls to see how it behaves
3With the ignition off, use a multimeter to check that the signal wires have no open circuit and are not shorted to ground or supply voltage
4If you have diagnostic equipment, check the A/C system status in live data while the compressor is running and the A/C is switched on
5If the wiring is intact but the fault remains, have a workshop check the control valve on the A/C compressor

Symptoms you may notice1

The A/C system does not work

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