VolvoElectrical Parts

3985226 — Throttle Position Sensor 3985226 85109590 For Volvo Truck Fh Fh12 Fh16 Fm Fm12 Nh12 Vah Vhd Vn Vt

This throttle position sensor is a critical component of the engine control system, accurately measuring the throttle pedal's position to inform the engine's fuel and air mixture. It ensures optimal engine performance and fuel efficiency by providing precise data to the ECU, unlike a worn sensor which can provide erratic or incorrect readings. Operators may notice inconsistent engine power, rough idling, or a 'check engine' light when this sensor begins to fail.

Throttle Position Sensor 3985226 85109590 For Volvo Truck Fh Fh12 Fh16 Fm Fm12 Nh12 Vah Vhd Vn Vt – Part No 3985226 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryElectrical Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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Installation & Application Notes

Disconnect main battery before working on electrical components. Use dielectric grease on all connector pins. Check ground connections — most electrical faults trace to poor grounds. Test with multimeter before installing new parts.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeThrottle Position Sensor (TPS)
MaterialPlastic, Metal, Electronic Components
ApplicationEngine Control System
Service LifeReplace as needed based on diagnostic codes
CompatibilityVolvo FH, FH12, FH16, FM, FM12, NH12, VAH, VHD, VN, VT
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing throttle position sensor often include hesitation during acceleration or inconsistent engine RPM. If left unaddressed, the engine may experience rough idling, stalling, and a significant loss of power, impacting operational capability. Continued operation with a faulty TPS can lead to increased fuel consumption and potential damage to other engine management components.

Installation Tip

Before installing, ensure the throttle body is clean and free from carbon buildup, as this can affect the sensor's reading. Avoid overtightening the mounting screws, as this can damage the sensor housing or strip the threads.

Service Note

Inspect the throttle body for carbon buildup and clean as necessary; also check the wiring harness for any signs of damage or corrosion.