Applicable Systems
9R Tractor
Symptoms
Coolant level sensor signal abnormal; low coolant warning may display incorrectly.
Possible Causes
- Coolant level sensor float stuck
- Sensor signal wire short/open
- Coolant actually low
Troubleshooting Steps
- Step 1: Check coolant level at radiator/overflow tank
Level at or above MIN - Step 2: Inspect coolant level sensor at radiator
Sensor clean, float moves freely - Step 3: Check sensor signal wire continuity
Wire continuity good - Step 4: Replace coolant level sensor if faulty
New sensor signal correct - Step 5: Clear code and verify coolant level monitoring
No false warnings
How to Reset
Clear via Service Advisor after sensor replacement.
Common Replacement Parts
- Coolant Level Sensor P/N: RE274957
Frequently Asked Questions
- Q: Where is coolant level sensor on JD tractor?
Typically mounted at radiator top tank or overflow/expansion tank. Check model-specific service manual for exact location.
Source: johndeerefaultcodes.com
Category: Heavy Equipment