How to replace the Coolant Temperature Sensor for the 2010 Toyota Prius?

The Engine Coolant Temperature (ECT) sensor is a thermistor that changes its resistance based on temperature variations, affecting the voltage signal sent to the ECM; as the sensor temperature decreases, resistance increases, and as the temperature increases, resistance decreases, with any issues in the ECT sensor circuits triggering a diagnostic trouble code. For 2009 and earlier models, ensure the ignition key is off, drain the engine coolant and transaxle/inverter/converter coolant, remove the inverter/converter assembly, disconnect the wiring from the sensor, and remove it along with the gasket, which is located at the left end of the engine. Installation involves reversing the removal process and replacing the gasket, followed by refilling the cooling systems. For 2010 and later models, remove the EGR valve and cooler assembly, take out the two mounting bolts from the coolant reserve tank and move it aside, disconnect the wiring from the ECT sensor, and unscrew the sensor. Installation is again the reverse of removal, ensuring the seal is replaced.

Genuine 2010 Toyota Prius Coolant Temperature Sensor

Coolant Water Temperature Sensor

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2010 Toyota Prius Sensor, Water Temperature
Part Number: 89422-33030
$63.12 MSRP: $88.98
You Save: $25.86 (30%)
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Product Specifications
- Other Name: Sensor, Water Temperature (For E.F.I.); Coolant Temperature Sensor, Temperature Sensor
- Comment: (FOR E.F.I.)
- Item Weight: 0.50 Pounds
- Item Dimensions: 2.4 x 1.2 x 0.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89422-33030
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
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Fits the following 2010 Toyota Prius Submodels:
- E, G, L, S | 4 Cyl 1.5L, 4 Cyl 1.8L | 1NZFXE, 2ZRFXE; NHW20L-AHEEBA, NHW20L-AHEEBK, ZVW30L-AHXBBA, ZVW30L-AHXEBA, ZVW30L-AHXEBK, ZVW30L-AHXGBA, ZVW35L-BHXBBA, ZVW35L-BHXEBA, ZVW35L-BHXEBK, ZVW35L-BHXGBA, ZVW50L-AHXEBA, ZVW51L-AHXBBA, ZVW51L-AHXEBA, ZVW51L-AHXGBA, ZVW51L-AHXHBA, ZVW55L-AHXEBA, ZVW55L-AHXGBA
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2010 Toyota Prius Sensor, Temperature
Part Number: 89429-47010
$59.13 MSRP: $82.66
You Save: $23.53 (29%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor, Water Temperature
- Manufacturer Note: MEXICO SPEC
- Item Weight: 1.00 Pounds
- Item Dimensions: 2.9 x 1.7 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89429-47010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2010 Toyota Prius Submodels:
- E, G, L, S | 4 Cyl 1.5L, 4 Cyl 1.8L | 1NZFXE, 2ZRFXE; NHW20L-AHEEBA, NHW20L-AHEEBK, ZVW30L-AHXBBA, ZVW30L-AHXEBA, ZVW30L-AHXEBK, ZVW30L-AHXGBA, ZVW35L-BHXBBA, ZVW35L-BHXEBA, ZVW35L-BHXEBK, ZVW35L-BHXGBA, ZVW50L-AHXEBA, ZVW51L-AHXBBA, ZVW51L-AHXEBA, ZVW51L-AHXGBA, ZVW51L-AHXHBA, ZVW55L-AHXEBA, ZVW55L-AHXGBA

2010 Toyota Prius Coolant Temperature Sensor

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2010 Toyota Prius Coolant Temperature Sensor Parts Questions & Experts Answers

Q: How to replace the Coolant Temperature Sensor for the 2010 Toyota Prius?
A: The Engine Coolant Temperature (ECT) sensor is a thermistor that changes its resistance based on temperature variations, affecting the voltage signal sent to the ECM; as the sensor temperature decreases, resistance increases, and as the temperature increases, resistance decreases, with any issues in the ECT sensor circuits triggering a diagnostic trouble code. For 2009 and earlier models, ensure the ignition key is off, drain the engine coolant and transaxle/inverter/converter coolant, remove the inverter/converter assembly, disconnect the wiring from the sensor, and remove it along with the gasket, which is located at the left end of the engine. Installation involves reversing the removal process and replacing the gasket, followed by refilling the cooling systems. For 2010 and later models, remove the EGR valve and cooler assembly, take out the two mounting bolts from the coolant reserve tank and move it aside, disconnect the wiring from the ECT sensor, and unscrew the sensor. Installation is again the reverse of removal, ensuring the seal is replaced.