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.
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)
- 2012-2021 Grand Cherokee 3.6L Oil Filter Adapter Leak - Identify the Source First2012-2021
Oil found around the Pentastar oil filter adapter does not prove that the complete adapter or oil cooler has cracked. FCA's service guidance separates several repair paths: a cap O-ring that is cut, damaged, or installed in the wrong groove; five adapter bolts that are not at the specified torque; and a confirmed leak at the adapter-to-block O-rings and gaskets. FCA's 2021 guidance tells technicians to reseal a confirmed interface leak rather than replace the adapter on the covered non-2014 vehicles, while model-year 2014 is handled as an adapter-replacement exception. The previous card treated 2011-2020 vehicles alike, prescribed an aluminum assembly, implied oil/coolant cross-contamination, and listed P0128 and P26B7 without reviewed support.
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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 vary widely depending on the root cause and specific Jeep model.
Which Jeep models have P26B7 documented?▼
Au7o has documented P26B7 on 1 Jeep model: Grand Cherokee.