2000 Chrysler Voyager Coolant Temperature Sensor Guide
Is your Voyager running rough, getting bad gas mileage, or showing a check engine light? Your coolant sensor could be the problem.
- A bad coolant sensor on your 2000 Voyager will likely cause a Check Engine Light with codes P0117 or P0118, poor gas mileage, and potential overheating.
- Replacement is a simple DIY job that takes less than an hour with basic tools like a 19mm deep socket.
- There are no specific recalls for this part; failure is usually due to age.
- Do not drive for long periods with a bad sensor, as you risk engine damage from overheating.
Is Your Voyager's Coolant Sensor Failing?
When the Engine Coolant Temperature (ECT) sensor on your 2000 Chrysler Voyager starts to fail, it can cause a surprising number of issues. Because the engine's computer relies on this sensor for critical data, a bad signal can make the engine think it's colder or hotter than it actually is. This leads to poor performance and can damage other parts over time. Ignoring the symptoms is not recommended, as it can lead to poor fuel economy or even engine overheating.
Symptoms of a Bad Coolant Temperature Sensor
- Check Engine Light: This is often the first sign. The computer will detect a signal from the sensor that is out of the normal range and trigger a fault code, commonly P0117 or P0118.
- Poor Fuel Economy: If the sensor wrongly tells the computer the engine is cold, the computer will enrich the fuel mixture, wasting gas.
- Black Smoke from Exhaust: A very rich fuel mixture, caused by a bad sensor, can result in unburned fuel burning in the hot exhaust pipe, creating black smoke.
- Rough Idle and Hard Starting: An incorrect temperature reading can lead to the wrong fuel and air mix, causing your Voyager to run rough or be difficult to start.
- Cooling Fans Act Up: The fans might run all the time, even when the engine is cold, or they might not turn on when the engine is actually overheating.
- Engine Overheating: If the sensor fails to report a high temperature, the cooling fans may not turn on, leading to the engine overheating.
Pro Tip: Check the Connector First
Sometimes the problem isn't the sensor itself, but a corroded or loose electrical connector. Before you replace the sensor, inspect the wiring and connector for any green corrosion or damage. Wiggling the connector with the engine running might point to a bad connection rather than a bad sensor.
Choosing the Right Aftermarket Sensor
For a part like the coolant temperature sensor, you don't necessarily need to buy an expensive OEM part from the dealer. Quality aftermarket brands provide reliable performance at a lower cost. Since this is a simple electronic sensor, the key is choosing a brand with a good reputation for quality control. An aftermarket sensor from a known manufacturer is a cost-effective and reliable choice for this repair.
Known Issues, Recalls, and Bulletins
As of early 2026, searches of the National Highway Traffic Safety Administration (NHTSA) database show no specific recalls for the engine coolant temperature sensor on the 2000 Chrysler Voyager. There are also no widespread Technical Service Bulletins (TSBs) related to this specific part for this model year. Failure is typically due to age and normal wear.
DIY Replacement and Cost
Replacing the coolant temperature sensor is a straightforward job that most DIY mechanics can handle in under an hour.
Location: The sensor is typically screwed into a coolant passage on the engine. On the popular 3.3L V6 engine, it's often found on the front of the engine near the thermostat housing, sometimes behind the dipstick. You may need to move the ignition coil to get access.
Process: Let the engine cool completely. Place a drain pan underneath and partially drain the coolant. Disconnect the electrical plug, then use a deep socket wrench (a 19mm or 3/4 inch is common) to unscrew the old sensor. Install the new sensor, reconnect the plug, and top off the coolant.
| Part Type | Price Range |
|---|---|
| New Aftermarket Sensor | $26.20 |
| Estimated Shop Labor | $90 - $135 |
| Estimated Total (Shop) | $116.20 - $161.20 |
Frequently Asked Questions
Where is the coolant temperature sensor located on a 2000 Chrysler Voyager?
On models with the 3.3L V6 engine, the sensor is usually on the front of the engine near the thermostat housing. For other engines, it can be on the cylinder head or intake manifold. Always confirm the location for your specific engine before starting.
Do I need to drain the coolant to replace the sensor?
Yes, you should drain some of the coolant from the radiator before removing the old sensor. If you don't, coolant will spill out of the sensor port when you unscrew it.
What tools are needed to replace the ECT sensor?
You will typically need a ratchet with a deep well socket (often 19mm or 3/4"), a drain pan for the coolant, and possibly a screwdriver to help release the electrical connector clip.
Can I drive my Voyager with a bad coolant sensor?
You can drive for short distances, but it is not recommended. A bad sensor can cause very poor fuel economy, stalling, and carries the risk of the engine overheating, which can lead to severe and expensive damage.
Technical Specifications
Typically features a 2-pin blade-style male connector. The sensor is a thermistor that changes resistance based on coolant temperature.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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