2016 Jaguar P0128: What It Means & Is It Safe to Drive?
P0128 on the 2016 Jaguar: Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
The engine is not reaching normal operating temperature in the expected time. Usually a stuck-open thermostat.
Common causes on the 2016 Jaguar
- Thermostat stuck open
- Coolant temperature sensor fault
- Low coolant level
Symptoms
- Check Engine Light
- Heater may blow cold
- Poor fuel economy
- Temperature gauge stays low
Typical fixes
- Replace thermostat
- Replace coolant temperature sensor if faulty
- Refill coolant and check for leaks
Repair cost range
For a 2016 Jaguar, repairs for P0128 typically fall between $100 and $350, depending on the root cause and labor rates in your area.
Known issues on Jaguar
Jaguar P0128 on AJ V6 and V8 engines is relatively uncommon. When it occurs it indicates a failed thermostat; genuine Jaguar thermostats are recommended as aftermarket units may not replicate the exact opening temperature spec.
Most commonly affected models
XF 2009–2015XJ 2010–2019F-Pace 2017–2021