BRAND NEW *OEM Quality* engine coolant temperature sensor for Ford Escape ZC, Ford Courier PH and Mazda Tribute, MPV and B-Series with the 3.0L/4.0L AJ V6.

A failing coolant sensor on the shared Ford/Mazda AJ V6 can throw off the fuel trim, cause a rough or high idle, or leave the cooling fan running after shutdown. This direct-fit replacement restores an accurate reading so the ECU can manage fuelling and fan control correctly. Same-day dispatch before 12pm from Cranbourne VIC.

TO SUIT

Ford Escape ZC 3.0L AJ V6 (2001 - 2008)
Ford Courier PH 4.0L V6 (2005 - 2006)
Mazda Tribute EP 2.3L and 3.0L AJ V6 (2001 - 2008)
Mazda MPV LW 3.0L AJ V6 (2002 - 2006)
Mazda B-Series MJ2E B4000 Bravo 4.0L V6 (2005 - 2006)

Full model, engine and year breakdown is listed in the suitability section below - please confirm against your original sensor or OEM number before ordering.

OEM PART NUMBERS

3L8Z12A648AA
3L8A12A648AA
1822418
AJ5718840A

OTHER PART NUMBERS

Walker Products: 211-1070

PACKAGE INCLUDES

1 x engine coolant temperature sensor with 2-pin oval connector.

ABOUT THIS SENSOR

The engine coolant temperature sensor measures coolant temperature and reports it to the ECU, which uses the reading to control fuel injection, ignition timing and cooling fan operation.

On the shared Ford/Mazda AJ V6 fitted across the Escape, Courier, Tribute, MPV and B-Series, a degraded sensor is a common cause of a rough or high idle and an inaccurate temperature gauge.

COMMON SYMPTOMS OF FAILURE

Check Engine Light on, often with fault code P0116 or P0128
Rough or high idle
Cooling fan runs constantly or after engine shutoff
Poor fuel economy
Inaccurate or erratic temperature gauge reading

[2001 - 2004] FORD ESCAPE BA,ZA,ZB,ZC,ZD Wagon 3.0 All-wheel Drive (3.0L 6cyl AJ 150kW Petrol AWD)
[2004 - 2008] FORD ESCAPE BA,ZA,ZB,ZC,ZD Wagon 3.0 All-wheel Drive (3.0L 6cyl AJ 152kW Petrol AWD)
[2005 - 2006] FORD COURIER PH Ute 4.0 i (4.0L 6cyl 1V 154kW Petrol RWD)
[2005 - 2006] FORD COURIER PH Ute 4.0 i 4x4 (4.0L 6cyl 1V 154kW Petrol AWD)
[2001 - 2007] MAZDA TRIBUTE EP SUV 3.0 V6 AWD (EPFW) (3.0L 6cyl AJ 149kW Petrol AWD)
[2004 - 2008] MAZDA TRIBUTE EP SUV 2.3 AWD (EP3W) (2.3L 4cyl L3-VE 110kW Petrol AWD)
[2004 - 2008] MAZDA TRIBUTE EP SUV 3.0 V6 AWD (EPFW) (3.0L 6cyl AJ 152kW Petrol AWD)
[2002 - 2006] MAZDA MPV LW MPV 3.0 (LW10J) (3.0L 6cyl AJ 152kW Petrol FWD)
[2002 - 2006] MAZDA MPV LW MPV 3.0 i V6 (LWFW) (3.0L 6cyl AJ 147kW Petrol FWD)
[2005 - 2006] MAZDA B-SERIES MJ Platform/Chassis 4.0 B4000 Bravo i (MJ2E) (4.0L 6cyl 1V 154kW Petrol RWD)
[2005 - 2006] MAZDA B-SERIES MJ Ute 4.0 B4000 Bravo i (MJ2E) (4.0L 6cyl 1V 154kW Petrol RWD)
[2005 - 2006] MAZDA B-SERIES MJ Ute 4.0 B4000 Bravo i 4x4 (MJ2E) (4.0L 6cyl 1V 154kW Petrol AWD)

How do I test a coolant temperature sensor?

The most common test is to measure the sensor resistance with a multimeter at a known coolant temperature and compare against the manufacturer resistance curve. A cold engine (20 degrees C) typically reads 2,000 to 3,000 ohms and drops to around 200 to 300 ohms at operating temperature (90 degrees C). An OBD2 scanner showing a fixed temperature reading that does not change as the engine warms up is also a strong indicator of sensor failure.

Can a faulty coolant temperature sensor cause my engine to overheat?

Indirectly yes. If the sensor reports a lower temperature than actual, the ECU may not activate the cooling fan at the correct time, allowing the engine to overheat. It can also suppress the dashboard warning light, meaning you may not be alerted until the engine is already at a dangerously high temperature. Replace a suspected faulty sensor promptly.

Do I need to drain the coolant to replace the sensor?

Not always - many coolant temperature sensors can be replaced quickly with minimal coolant loss if you work fast and have a replacement ready to thread in immediately. However on some vehicles the sensor location requires partial coolant drainage. Check the sensor position on your specific engine before starting. Always use fresh coolant when topping up after replacement.

What are the symptoms of a faulty coolant temperature sensor?

Symptoms include poor fuel economy, black smoke, engine overheating warning, incorrect temperature gauge reading, hard starting when cold, and rough idle. Fault codes P0115 to P0119 are commonly associated with coolant temperature sensor faults.

Is it safe to drive with a bad coolant temperature sensor?

A faulty coolant temperature sensor can cause the ECU to run rich fuel mixtures and prevent the cooling fan from operating correctly, risking engine overheating. Replace it promptly - it is a low-cost part that can prevent expensive engine damage.

How do I know if my coolant temperature sensor or my thermostat is faulty?

A faulty thermostat typically causes the engine to overheat or never reach operating temperature. A faulty coolant temp sensor causes incorrect gauge readings and running issues but the coolant itself may be at the correct temperature. An OBD2 scanner showing live coolant temp data helps distinguish between the two.

Are there two coolant temperature sensors on my vehicle?

Many vehicles have two sensors - one for the ECU (engine management) and one for the dashboard temperature gauge. They look similar but are not interchangeable. Check your vehicle's service manual or contact us with your vehicle details to confirm which sensor you need.

Identification
SKU	CTS138-CCS145-6
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CCS145
Reference OEM Number	3L8Z12A648AA
Other OEM Numbers	3L8Z12A648AA, 3L8A12A648AA, AJ5718840A, 1822418
Trade Part Numbers	Walker Products: 211-1070
Product Specifics
Product Type	SENSOR
Sensor Type	ENGINE COOLANT TEMPERATURE SENSOR
Number of pins	2-Pin
Connector Shape	oval
Housing Colour	Light Grey
Mounting Type	Pressed
Compatible Makes	Ford, Mazda
Fitment Type	Direct Replacement
Other Details
Note	Always verify fitment using your vehicle's OEM part number.
Unit Of Measure	ea