P26B7: Engine Coolant Bypass Valve "C" Control Circuit/Open
3 vehicles · 2 makes · $350-$1,800 repair
Most Reported On
P26B7 is an OBD-II diagnostic trouble code meaning “Engine Coolant Bypass Valve "C" Control Circuit/Open.” This code means the engine computer detected an open (broken) electrical circuit in the control wiring for engine coolant bypass valve 'C', so it cannot properly command that valve. The coolant bypass valve controls coolant flow through the engine to even out temperatures and reduce hot spots, staying closed when cold and opening as the engine warms. If the valve cannot be controlled, the engine can overheat or have poor heater performance, so this should be addressed before it leads to overheating damage. This code is most commonly reported on 2017-2023 Jaguar F-PACE (25t, 30t, R-Sport, S), 2017-2023 Jaguar XE (25t, 30t, R-Sport, S), and 2011-2020 Jeep Grand Cherokee (Laredo, Limited, Trailhawk, Overland), with repair costs ranging from $350 to $1,800.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P26B7, 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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Vehicles Affected (3)
FAQ
What does P26B7 mean?
P26B7 stands for "Engine Coolant Bypass Valve "C" Control Circuit/Open." This code means the engine computer detected an open (broken) electrical circuit in the control wiring for engine coolant bypass valve 'C', so it cannot properly command that valve. The coolant bypass valve controls coolant flow through the engine to even out temperatures and reduce hot spots, staying closed when cold and opening as the engine warms. If the valve cannot be controlled, the engine can overheat or have poor heater performance, so this should be addressed before it leads to overheating damage.
What are the most common causes of P26B7?
The most common causes of P26B7 are: Open or broken wiring to the coolant bypass solenoid/valve C, Faulty coolant bypass valve/solenoid (internal open), Damaged, corroded, or disconnected connector, Blown fuse or poor ground in the control circuit, Chafed harness near the engine/bellhousing area, PCM/ECM driver fault (rare). The specific cause varies by vehicle.
How much does it cost to fix P26B7?
Repair costs for P26B7 range from $350 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by P26B7?
Au7o has documented P26B7 across 3 vehicle models from 2 manufacturers: Jaguar, Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.