P26B7 on Jeep
Engine Coolant Bypass Valve "C" Control Circuit/Open
P26B7 on Jeep vehicles indicates engine coolant bypass valve "c" control circuit/open. Au7o has documented this code across 1 Jeep model — most commonly on Grand Cherokee. 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. Typical repair costs on Jeep range from $350 to $900, depending on the specific model and root cause.
Common Causes of P26B7
- •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)
P26B7 on Jeep by Model
Jeep Grand Cherokee(1 issue)
- 3.6L Pentastar Oil Filter Housing / Oil Cooler Assembly Leak2011-2020
The 3.6L Pentastar's oil filter housing / oil cooler assembly sits in the valley between the cylinder heads and is originally made of plastic, which warps and cracks after repeated heat cycling. It commonly weeps oil and/or coolant, with leaking oil often misdiagnosed as a rear main seal leak because it drips down the back of the block. If oil and coolant cross-contaminate, it can damage both systems; severe oil loss risks starvation.
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View P26B7 across all makes →Frequently Asked Questions
What does P26B7 mean on Jeep?▼
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. On Jeep specifically, this code is documented across 1 model.
What causes P26B7 on Jeep vehicles?▼
Common causes on Jeep: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P26B7 on a Jeep?▼
Repair costs on Jeep range from $350 to $900, depending on the specific model and root cause.
Which Jeep models have P26B7 documented?▼
Au7o has documented P26B7 on 1 Jeep model: Grand Cherokee.