P00B7 on Cadillac
Engine Coolant Flow Low/Performance
P00B7 on Cadillac vehicles indicates engine coolant flow low/performance. Au7o has documented this code across 1 Cadillac model — most commonly on XTS. 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 Cadillac range from $350 to $700, 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 Cadillac by Model
Cadillac XTS(1 issue)
- Water Pump Weep-Hole Coolant Leak (3.6L V6)2013-2019
The 3.6L V6 water pump develops an internal seal failure that lets coolant seep from the pump's weep hole — a designed indicator that the pump's internal shaft seal has failed. Owners commonly mistake the weep-hole drip for a 'pinhole' and try stop-leak, but it signals the pump is failing internally and will progress to overheating and potential head-gasket/engine damage. Low-coolant warnings, sweet smell, and white residue at the front of the engine are typical. RepairPal lists coolant leaks (pump, hoses, radiator) among the most common XTS cooling complaints.
Looking for P00B7 on a different make?
View P00B7 across all makes →Frequently Asked Questions
What does P00B7 mean on Cadillac?▼
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 Cadillac specifically, this code is documented across 1 model.
What causes P00B7 on Cadillac vehicles?▼
Common causes on Cadillac: 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 Cadillac?▼
Repair costs on Cadillac range from $350 to $700, depending on the specific model and root cause.
Which Cadillac models have P00B7 documented?▼
Au7o has documented P00B7 on 1 Cadillac model: XTS.