What does fault code ECM-P033100 mean?

Diagnostic fault code details for ECM-P033100 (Volvo S60 (2011–), Volvo S60 (2011–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P033100 - Knock Sensor 2 Circuit Range/Performance (Bank 2). General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

7 models

S60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)

Show models by year and engine (13)

What does this fault code mean?

Knock sensor 2, which registers knock on cylinders 1 to 4, must give a signal within limits that depend on engine speed. If the signal is above or below those limits, the fault code is set. The code indicates a general fault without a more specific type.

Possible causes

Loosely fitted knock sensor
Damaged knock sensor
Contact resistance or oxidation at the knock sensor plug

What you can do

1Read the fault code, clear it and test drive the car
2Check that knock sensor 2 is firmly seated and correctly fitted
3Check the plug on knock sensor 2 for contact resistance and oxidation
4If you have a diagnostic tool: read the knock signal from sensor 2 in live data and see whether it follows engine speed
5Have a workshop with diagnostic equipment replace knock sensor 2 if it is damaged

Symptoms you may notice3

Reduced performance
The engine lacks power
The engine hesitates, surges or runs roughly during acceleration, slowing down and constant speed

What the fault can affect1

Ignition timing is retarded as a safety measure

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