ecm-640a
Moderate
Volvo · Sedans & Wagons
Volvo: Throttle Position Sensor
Quick Answer
Error code ECM-640A on your Volvo Sedans & Wagons means: Volvo: Throttle Position Sensor. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Inspect throttle position sensor connector
2
Test sensor voltage output across throttle range
3
Check mechanical throttle linkage operation
4
Verify sensor mounting and alignment
5
Replace sensor if voltage signal is non-linear
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Throttle position sensor
Throttle body gasket
Sensor connectors
Throttle cable or drive-by-wire components
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