Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2010XC70 AWD L6-3.2L VIN 96 B6324S2REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP0331P033121 (ENGINE CONTROL MODULE - ECM)DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2
Diagnostic Trouble Code (DTC) Information
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information ECM-P033121
Condition
The knock sensor signal varies with engine speed. The engine control module (ECM) checks that the knock sensor signal is within certain limits, which are determined by engine speed. The diagnostic trouble code is generated if the signal from the knock sensor is not within the limit values.
The diagnostic trouble code can be diagnosed during a road test.
The diagnostic trouble code refers to knock sensor 2.
Substitute value
- Ignition angle reduction for reasons of safety.
Possible source
- Contact resistance or oxidation in the connector for the knock sensor (KS).
- Loosely installed knock sensor (KS).
- Damaged knock sensor (KS).
Fault symptom[s]
- Poor performance.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.