Level Sensor
Stop False Low Coolant Warnings with the Level Sensor 9646901580 / 9609955680 Few things are more annoying than a dashboard warning light that stays on when you know the fluid level is fine. The level sensor from Flying Bull solves that problem. It is a direct replacement liquid level sensor for Peugeot 3008, Peugeot 408 (new model), Citroën C4L, and other PSA vehicles with 1.6T engines. The sensor is available in two versions: short needle (OE 9646901580 / 63299033A) and long needle (OE 9609955680 / 63299058A). It is 100% brand new, manufactured in Zhejiang, China, and backed by a 1‑year warranty. Delivery takes 7–15 working days. The common problem: false low coolant warnings Liquid level sensor failure seems to be a common problem. Many car owners have encountered this issue: After starting the car, the dashboard jumps with a fault light. The screen displays: “Please add antifreeze!” (low coolant warning). You check the coolant level – it is full, not low. Everything seems normal. You search online forums and find other drivers with the exact same fault. The conclusion: the level sensor is faulty. The sensor is sending a false “low level” signal to the engine control unit (ECU) or instrument cluster, even though the expansion tank is full. Which level sensor do you need? The correct level sensor depends on your vehicle and expansion tank design. Generally: Peugeot 3008 1.6T uses the short needle sensor (OE 9646901580). Citroën C4L 1.6T uses the long needle sensor (OE 9609955680). Always verify your original part number before ordering. If you remove your old sensor, you can see whether it has a short or long probe. How to replace a faulty level sensor – step‑by‑step: 1. Locate the coolant expansion tank – Open the hood. Find the white or translucent plastic tank (kettle) that holds engine coolant (antifreeze). 2. Drain coolant (optional but cleaner) – Open the tank cap. Use a clean tube to siphon coolant down to below the sensor level. You can also use a shampoo bottle pump head to remove the fluid. This prevents spills when you remove the sensor. 3. Find the level sensor – Look on the outside of the expansion tank. The level sensor is a black plastic unit inserted into the tank wall. It has an electrical connector with wiring harness attached. 4. Disconnect the wiring harness – Find the connector joint. There is a clip in the middle that holds the harness. Use a small key or flathead screwdriver to press the clip gently. Hold the clip with your hand – if it pops out, it may fall into the engine bay and be difficult to find. 5. Remove the old level sensor – Grasp the level sensor and rotate it clockwise (or counterclockwise depending on design – usually a quarter‑turn). Apply steady, gentle force to pull it out. The sensor has a rubber seal (O‑ring) that creates resistance. Do not yank or force it. Pull with dexterity, not brute strength. 6. Install the new level sensor – Insert the new sensor into the same opening. Push it in firmly, then rotate it to lock it in place (reverse of removal). Ensure the rubber seal seats properly to prevent coolant leaks. 7. Reconnect the wiring harness – Plug the connector back onto the new sensor. Push until the center clip clicks into place. 8. Refill coolant – If you drained fluid, refill the expansion tank to the proper level with the correct type of antifreeze (check your owner’s manual). 9. Start the engine and test – Start the car. The low coolant warning light should turn off. If it stays on, you may need to clear fault codes with a diagnostic scanner. Why choose Flying Bull’s level sensor? Direct replacement – Matches OE dimensions, connector type, and electrical specifications. Solid‑state design – No moving parts to stick or wear out. Corrosion resistant – Withstands hot coolant and engine bay chemicals. Easy installation – Simple quarter‑turn removal and replacement. Flying Bull’s level sensor (9646901580 / 9609955680) stops false warnings and keeps your dashboard accurate. Choose Flying Bull for reliable engine protection.
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 (FAQ)
1. What are the OE numbers for this level sensor?
Two versions: Short needle – OE 9646901580 / 63299033A (fits Peugeot 3008 1.6T). Long needle – OE 9609955680 / 63299058A (fits Citroën C4L 1.6T). Always check your original sensor.
2. What symptoms indicate a faulty level sensor?
The most common symptom: the low coolant warning light stays on or flashes, and the screen displays "Please add antifreeze," even though the coolant level is full and normal.
3. Why does a level sensor fail?
Over time, the sensor's internal electronics can degrade due to heat cycling (hot coolant, cold engine bay), vibration, and chemical exposure. The sensor may then send a false "low level" signal even when the tank is full.
4. Which vehicles use this level sensor?
This sensor is adapted to Peugeot 3008, Peugeot 408 (new model), Citroën C4L, and other PSA vehicles with the 1.6T engine. Verify your original OE number before ordering.
5. How do I remove the old level sensor?
First, disconnect the wiring harness (press the center clip gently – hold the clip so it does not pop out and fall). Then, grasp the sensor and rotate it clockwise (about a quarter‑turn) while pulling gently. It has a rubber seal, so some resistance is normal.
6. Do I need to drain the coolant before removing the sensor?
It is not strictly required, but draining coolant to below the sensor level prevents spills. Use a tube to siphon or a shampoo pump head to remove coolant from the expansion tank.
7. What should I do if the low coolant warning stays on after replacing the sensor?
First, double‑check that the connector is fully seated (the center clip clicked). Then, start the engine and let it warm up. If the light stays on, you may need to clear fault codes with an OBD‑II scanner. Some vehicles require fault code erasure even after a successful repair.
8. Does the level sensor come with a warranty?
Yes. Flying Bull provides a 1‑year warranty against manufacturing defects. Damage caused by incorrect installation, physical impact, or using the wrong needle length for your vehicle is not covered.
9. 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. They match the original dimensions, seal type, and electrical characteristics.
10. What is the difference between the short needle and long needle sensors?
The two sensors have different probe lengths. The short needle (9646901580) is for shallower expansion tanks (e.g., Peugeot 3008). The long needle (9609955680) is for deeper tanks (e.g., Citroën C4L). Using the wrong length may give inaccurate readings.
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