What does fault code ECM-P064D68 mean?

Diagnostic fault code details for ECM-P064D68 (Volvo S80 (2007–), Volvo S80 (2007–), Volvo V70 (2008–)). Repair service at OBD Tuning.

VOLVO

ECM-P064D68 - Internal Control Module O2 Sensor Processor Performance - Bank 1. Algorithm Based Failures. Event information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

5 models

S80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)

Show models by year and engine (10)

What does this fault code mean?

This event-controlled code is meant as information and does not mean the control module where it appears is faulty. The signals from the bank 1 rear oxygen sensor have stayed above or below the permitted range for a longer period, which can happen after a stretch of normal driving without heavy load. The code has little value for fault-finding.

Possible causes

Leak in the exhaust system
Contact resistance in the connections
Damaged wiring harness
Damaged oxygen sensor (HO2S)

What you can do

1Look for other stored fault codes on the oxygen sensors or the exhaust system and trace those first
2Check that the exhaust system does not leak, for example at joints in the exhaust pipe
3Check the connectors to the bank 1 oxygen sensor for contact resistance and oxidation, and look for chafed wires
4If you have diagnostic equipment, read the rear oxygen sensor signal in live data while driving and see whether it behaves abnormally
5If the code returns after leaks and connectors have been checked, have a workshop check the oxygen sensor

Symptoms you may notice1

No noticeable symptoms for the driver

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