All codes › P0117
P0117: Engine Coolant Temperature Circuit Low
What it means
The coolant temp sensor signal is too low (reads as overheating).
Severity: Medium Cooling fans may run constantly; check for real overheating first.
Common causes
- Shorted coolant temp sensor
- Wiring shorted to ground
- Actual overheating
- Failed connector
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Unplug the sensor: if the reading changes, the sensor is likely shorted.
Repair cost
SEEDED ESTIMATE Roughly $40–$210
Most likely repair: coolant temperature sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Coolant temperature sensor | $12 | $50 | Typical listed retail range, source |
| Labor 0.3–1 hr | $30 | $160 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0117 are verified.
Verified reader invoices for P0117: 0. Share your repair bill to help build real costs.
Tools that can read P0117
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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