P00B7 on Jaguar
Engine Coolant Flow Low/Performance
P00B7 on Jaguar vehicles indicates engine coolant flow low/performance. Au7o has documented this code across 1 Jaguar model — most commonly on XK. P00B7 means the powertrain control module has determined that coolant flow through the engine's cooling system is too low or not performing as expected. The computer compares signals — typically from the engine coolant temperature sensor and a second temperature sensor (such as the radiator outlet) — and flags this code when the readings indicate coolant isn't circulating properly to manage engine temperature. Restricted flow can let the engine run hotter than designed, risking overheating. The cause is usually a thermostat, water pump, low coolant, or a sensor reading problem. Typical repair costs on Jaguar range from $550 to $1,500, depending on the specific model and root cause.
Common Causes of P00B7
- •Stuck or faulty thermostat
- •Low coolant level or air pockets in the system
- •Failing water pump (mechanical or electric)
- •Faulty engine coolant temperature or radiator temperature sensor
- •Clogged radiator, hoses, or coolant passages with sediment/debris
- •Coolant leak reducing system volume
- •Wiring/connector faults at the temperature sensors or PCM control issue
P00B7 on Jaguar by Model
Jaguar XK(1 issue)
- 5.0L AJ133 Water Pump Bearing and Seal Failure2010-2015
The mechanical water pump on the 5.0L AJ133 V8 is a recognized weak point. Coolant migrates past the shaft seal into the bearing housing, corroding the bearing so the impeller shaft is no longer properly supported. This accelerates wear on the flat-face mechanical seal and lets coolant escape at the pump. Failures are common and can occur early — some owners report leaks in under 20,000 miles. Left unaddressed it leads to progressive coolant loss and overheating risk on an aluminum V8.
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View P00B7 across all makes →Frequently Asked Questions
What does P00B7 mean on Jaguar?▼
P00B7 stands for "Engine Coolant Flow Low/Performance." P00B7 means the powertrain control module has determined that coolant flow through the engine's cooling system is too low or not performing as expected. The computer compares signals — typically from the engine coolant temperature sensor and a second temperature sensor (such as the radiator outlet) — and flags this code when the readings indicate coolant isn't circulating properly to manage engine temperature. Restricted flow can let the engine run hotter than designed, risking overheating. The cause is usually a thermostat, water pump, low coolant, or a sensor reading problem. On Jaguar specifically, this code is documented across 1 model.
What causes P00B7 on Jaguar vehicles?▼
Common causes on Jaguar: Stuck or faulty thermostat, Low coolant level or air pockets in the system, Failing water pump (mechanical or electric), Faulty engine coolant temperature or radiator temperature sensor, Clogged radiator, hoses, or coolant passages with sediment/debris. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P00B7 on a Jaguar?▼
Repair costs on Jaguar range from $550 to $1,500, depending on the specific model and root cause.
Which Jaguar models have P00B7 documented?▼
Au7o has documented P00B7 on 1 Jaguar model: XK.