Level Sensor
Product Description: Level Sensor for Coolant Monitoring in Peugeot & Citroën (9646901580) Low coolant levels can lead to engine overheating, cylinder head damage, and costly repairs. The level sensor 9646901580 from Flying Bull is a direct replacement liquid level sensor designed for Peugeot, Citroën, and other PSA vehicles. It monitors the coolant level in the expansion tank and sends an electrical signal to the engine control unit (ECU) or instrument cluster. The sensor is 100% brand new, manufactured in Zhejiang, China, and backed by a 1‑year warranty. Delivery takes 7–15 working days. OE Numbers and Models: This level sensor is available in two configurations: Short Needle Sensor: OE numbers 9646901580 and 63299033A. Long Needle Sensor: OE numbers 9609955680 and 63299058A. Both sensors perform the same function (coolant level detection) but have different probe lengths to fit different expansion tank designs. This sensor is adapted to Peugeot 3008, Peugeot 408 (new model), Peugeot C4L, Citroën, and other PSA vehicles using the 1.6T engine. How the Level Sensor Works: The level sensor 9646901580 is a common type of sensor used to measure liquid level position. It converts the height of the fluid (coolant) into an electrical signal for output. The sensor typically outputs a current signal (4‑20 mA or 0‑20 mA) or a voltage signal (0‑5V, 1‑5V, 0‑10V). Most automotive coolant level sensors use a simple on/off (switch) output – open circuit when fluid is present, closed circuit when fluid is low (or vice versa). The ECU or instrument cluster reads that signal to turn on the low coolant warning light. Key Features of the Level Sensor 9646901580 / 9609955680: High Precision and Good Stability: The sensor accurately detects coolant level changes. Good stability means the sensor does not drift over time or with temperature changes. Strong Anti‑Interference Capability: Electrical noise from the alternator, ignition system, or other electronics does not affect the sensor’s reading. Three‑Level Lightning Protection Plan: The sensor includes surge protection, making it resistant to voltage spikes (e.g., from jump starting or load dumps). Excellent Long‑Term Stability: Zero drift and full‑scale drift are less than 0.1% FS (full scale) per year. That means the sensor will provide consistent readings for many years. Solid‑State Structure, No Moving Parts: The sensor has no floats, mechanical arms, or other moving components. That makes it highly reliable with a long service life. Built‑In Protection Circuits: The sensor includes a constant current feedback circuit and an internal protection circuit. These circuits limit the maximum output current to no more than 28 mA. That protects the ECU or instrument cluster from damage in case of a short circuit. The sensor also has reverse polarity protection. Environmentally Resistant: The sensor is acid resistant (coolant is mildly acidic), moisture resistant (engine bay humidity), shock resistant (vibration from driving), and corrosion resistant. Easy Installation: The sensor has a simple, compact structure. It screws into the expansion tank or push‑fits with a rubber grommet. No special tools are required. Common Failure Symptoms of a Faulty Coolant Level Sensor: Low Coolant Warning Light Stays On: The dashboard light illuminates even when the expansion tank is full. This is the most common symptom. Low Coolant Warning Light Never Comes On: The tank may be nearly empty, but the light does not warn you. This can lead to engine overheating without prior warning. Intermittent Warning: The light flashes on and off randomly while driving, usually due to a poor electrical connection or a failing sensor. Flying Bull’s level sensor 9646901580 is a direct replacement for the original Peugeot/Citroën part.
Product Introduction
Products Description
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Type: Level Sensor |
OE No.: 9646901580/9609955680 |
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Warranty: 1 YEAR |
Condition: New, 100% Brand-new |
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Place of Origin: Zhejiang, China |
Model No.: 63299058A/63299033A |
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Brand Name: FLYING BULL |
Quality: High-Quality |
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Delivery: 7-15 Working Days |
Application: Adapted to Peugeot 3008 |
Adapted to Peugeot 3008 new 408C4L Citroen liquid level sensor 1.6T
sub kettle pay kettle sensor
3008 1.6T for short needle OE: 9646901580
C4L 1.6T is suitable for long needle OE: 9609955680
Long needle model: 63299058A
Short pin model: 63299033A
Liquid level sensor fault exploration and repair
Liquid level sensor failure seems to be a common problem, many cars have encountered this problem, the car starts after the dashboard jump fault light, screen display please add antifreeze! After checking that the antifreeze does not reduce everything normal, and then go to the forum to see the same fault of the rider, and determine that the liquid level sensor is faulty. The liquid level sensor is removed, find the coolant pot, open the lid, first use a pipe to draw the coolant to the end, you can also use the shampoo to press the head, there is a black sensor outside the kettle, connected to the wiring harness, find the joint, there is a clip in the middle, the card harness, use a key or word to insert the middle, gently don't, remember the clip to hold with your hand, otherwise don't come out will jump out, I can't find it when I jump in the car. The clip is down, the plug is pulled down, and then grasp the level sensor clockwise rotation, strength to pull out, the point of dexterity, do not pull hard, he has a rubber ring inside, a little resistance, pull down is the level sensor. Then replace it with a new level sensor.
Company Introduction
Frequently Asked Questions (FAQs)
1. What are the OE numbers and needle lengths for this level sensor?
Two versions: Short needle – OE 9646901580 / 63299033A. Long needle – OE 9609955680 / 63299058A. The long needle version is for deeper expansion tanks. Choose the one that matches your original part.
2. Which vehicles use the level sensor 9646901580?
This sensor is adapted to Peugeot 3008, Peugeot 408 (new model), Peugeot C4L, and Citroën vehicles, especially those with the 1.6T engine. Always verify your original OE number before ordering.
3. How does the level sensor work?
The sensor converts the coolant level (height of fluid) into an electrical signal. Most automotive level sensors use a simple switch output – open circuit when fluid is present, closed circuit when low (or vice versa). The ECU or instrument cluster reads this signal to turn the warning light on or off.
4. What output signals are typical for liquid level sensors?
Common outputs include: current 4‑20mA, 0‑20mA (two‑wire or four‑wire) or voltage 0‑5V, 1‑5V, 0‑10V (three‑wire). For a simple coolant level switch, the output is typically a digital on/off signal.
5. What protection features does this sensor have?
The sensor includes: (1) Constant current feedback circuit. (2) Internal protection circuit limiting output to ≤28mA. (3) Reverse polarity protection. (4) Three‑level lightning protection (surge/overvoltage). These features protect the ECU and instrument cluster from damage.
6. What are the advantages of a solid‑state level sensor?
A solid‑state sensor has no moving parts (no floats, no mechanical arms). That means nothing to stick, wear out, or break. It offers high reliability and a long service life. It is also more resistant to vibration and shock than mechanical sensors.
7. How stable is this level sensor over time?
Zero drift and full‑scale drift are less than 0.1% FS (full scale) per year. That means the sensor will provide consistent, accurate readings for many years without recalibration.
8. What symptoms indicate a faulty level sensor?
(1) Low coolant warning light stays on when the tank is full. (2) Low coolant warning light never comes on when the tank is near empty. (3) Intermittent flashing of the warning light, usually due to a poor electrical connection or failing sensor.
9. Does the level sensor 9646901580 come with a warranty?
Yes. Flying Bull provides a 1‑year warranty against manufacturing defects. Damage caused by contamination, incorrect installation, overvoltage, or physical damage is not covered.
10. Is this sensor a direct replacement for the original Peugeot/Citroën part?
Yes. The 9646901580 (short needle) and 9609955680 (long needle) are manufactured as direct replacements for the original PSA level sensors. Always verify your original OE number and needle length before ordering.
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