P00B6 on 2015-2022 Ford Transit — Radiator Coolant Temperature / Engine Coolant Temperature Correlation
1 vehicles · 1 makes · $200-$2,500 repair
Most Reported On
P00B6 is an OBD-II diagnostic trouble code meaning “Radiator Coolant Temperature / Engine Coolant Temperature Correlation.” This code sets when the engine computer sees too large a difference between the radiator coolant temperature sensor and the engine coolant temperature (ECT) sensor. The computer compares these two readings to verify that coolant is flowing properly through the cooling system. When the values do not correlate within the expected range, this code is stored. It can point to a cooling system flow problem, a faulty sensor, or contribute to overheating and reduced fuel economy. This code is most commonly reported on 2015-2022 Ford Transit, with repair costs ranging from $200 to $2,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P00B6, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P00B6 mean?
P00B6 stands for "Radiator Coolant Temperature / Engine Coolant Temperature Correlation." This code sets when the engine computer sees too large a difference between the radiator coolant temperature sensor and the engine coolant temperature (ECT) sensor. The computer compares these two readings to verify that coolant is flowing properly through the cooling system. When the values do not correlate within the expected range, this code is stored. It can point to a cooling system flow problem, a faulty sensor, or contribute to overheating and reduced fuel economy.
What are the most common causes of P00B6?
The most common causes of P00B6 are: Faulty radiator coolant temperature sensor, Faulty engine coolant temperature (ECT) sensor, Stuck or failed thermostat affecting flow, Low coolant level or air in the cooling system, Wiring or connector fault at either sensor, Restricted coolant flow (clogged radiator or passages), Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P00B6?
Repair costs for P00B6 range from $200 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by P00B6?
Au7o has documented P00B6 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.