1. What is P00B7 in Ford F-150?

The P00B7 OBD-II code stands for Coolant Pump Performance/Circuit Malfunction. For the Ford F-150 (2018-2024)—America’s best-selling pickup—the code targets the electric coolant pump in the 3.5L EcoBoost V6 engine (standard in Lariat, Platinum, and Raptor trims). This pump regulates coolant flow to the engine’s turbochargers and cylinder heads, critical for maintaining optimal operating temperature (195-220°F) during towing (max 14,000 lbs for 3.5L EcoBoost) and heavy loads.

The F-150’s PCM (Powertrain Control Module) monitors the coolant pump’s voltage (12V) and speed (2,000-6,000 RPM) via a dedicated circuit. P00B7 triggers when the pump fails to meet performance thresholds—signaling a faulty pump motor, damaged wiring, or clogged coolant passages. This issue is widespread in 2019-2023 F-150s, addressed in Ford Technical Service Bulletin (TSB) 21-2363 for pump motor wear and coolant contamination (common in stop-and-go towing or off-road use).

F-150 Specific Note: The electric coolant pump in the 3.5L EcoBoost is mounted on the engine’s left side, near the turbocharger. Raptor and Lariat trims—used for extreme towing or off-roading—are 3x more likely to trigger P00B7: towing increases coolant demand, while off-road dust/debris clogs pump intake screens, straining the motor.

2. Common Causes of P00B7 in 2018-2024 F-150

P00B7 in F-150 3.5L EcoBoost models is tied to coolant system stress and environmental damage—below are real-world cases diagnosed with the ICARZONE UR800:

• Faulty Coolant Pump Motor (2021 F-150 Raptor 3.5L EcoBoost): A Raptor owner with 48,000 miles reported overheating during off-roading. The UR800’s Coolant Pump Speed Test showed 800 RPM (normal: 2,000-6,000 RPM). The pump motor burned out from dust clogging—replacing it with OEM #HC3Z-8A586-A restored flow.
• Damaged Pump Wiring (2020 F-150 Lariat 3.5L EcoBoost): A Lariat owner’s P00B7 was intermittent. The UR800’s Circuit Continuity Test found a broken wire in the pump harness (rubbed against the engine block). Splicing the wire with heat-shrink connectors (#Dorman 85518) fixed the circuit.
• Clogged Coolant Passages (2019 F-150 Platinum 3.5L EcoBoost): A Platinum owner’s P00B7 appeared after towing a 12,000-lb trailer. The UR800’s Coolant Flow Test showed restricted flow. Old coolant (6+ years) formed scale in pump passages—flushing with Ford Super Duty Coolant (#VC-7-B) cleared the clog.
• Failed PCM Driver (2022 F-150 King Ranch 3.5L EcoBoost): A King Ranch owner’s P00B7 persisted after pump replacement. The UR800’s PCM Output Test showed no voltage to the pump. Updating the PCM firmware via UR800’s "Ford Calibration" tool fixed the driver issue.

3. Key Symptoms of P00B7 in F-150 3.5L EcoBoost

P00B7 symptoms in the F-150 worsen with towing or high temperatures—watch for these coolant system-focused signs:

4. F-150 Trims/Engines Prone to P00B7

Ford service data highlights these 2018-2024 F-150 configurations with the highest P00B7 occurrence rates (all 3.5L EcoBoost V6):

5. Diagnose P00B7 with ICARZONE UR800

Diagnose P00B7 in your F-150 3.5L EcoBoost accurately with the UR800’s Ford-specific coolant system tools. Follow these steps (engine off, key in "ON" position):

Case Example: A 2021 F-150 Raptor failed Step 2 (750 RPM) and Step 4 (2.2 GPM). The UR800’s Component Location Tool guided pump access (remove engine cover, 4 bolts). Replacing the pump and flushing coolant fixed P00B7—verified by towing test (no overheating with 10,000-lb trailer).

6. How to Fix P00B7 in F-150 3.5L EcoBoost

Resolve P00B7 in your F-150 with these UR800-verified solutions (match to your diagnosis results):

1. Replace Faulty Electric Coolant Pump

1. Confirm pump failure via UR800’s Step 2. Drain coolant: Remove the radiator drain plug (driver’s side) and catch fluid in a 5-gallon pan (3.5L EcoBoost holds ~16 quarts).
2. Remove the engine cover (4 plastic clips) and locate the pump (left side of engine, near turbocharger).
3. Disconnect the pump’s electrical connector and remove the 4 mounting bolts (10mm socket).
4. Install an OEM electric coolant pump:
   • 2018-2020 F-150: #HC3Z-8A586-A
   • 2021-2024 F-150: #HC3Z-8A586-B (updated motor design)
5. Reinstall bolts (torque to 89 in-lbs), reconnect the connector, and refill with Ford Super Duty Coolant (#VC-7-B).
6. Bleed the cooling system: Start engine, run at 2,000 RPM for 10 minutes, then top up coolant. Clear P00B7 with UR800.

2. Repair Damaged Pump Wiring

1. Confirm wiring damage via UR800’s Step 3. Locate the frayed/broken wire in the pump harness (near engine block).
2. Cut the damaged section (1 inch on each side) and strip 1/4 inch of insulation from wire ends.
3. Splice wires with heat-shrink butt connectors (#Dorman 85518) and crimp with a wire crimper.
4. Heat connectors with a heat gun to seal—ensure no exposed wire. Secure the harness to the engine block with zip ties (away from moving parts).
5. Retest continuity with UR800, refill coolant if needed, and clear P00B7. Test drive uphill to verify pump function.

3. Flush Clogged Coolant Passages

1. Confirm clog via UR800’s Step 4. Drain old coolant (Step 1 above) and disconnect the upper radiator hose from the engine.
2. Attach a garden hose to the radiator inlet and flush with low-pressure water until fluid runs clear (10-15 minutes).
3. Remove the pump intake screen (small bolt on pump inlet) and clean with a wire brush—removes scale/debris.
4. Reinstall the screen and radiator hose. Refill with Ford Super Duty Coolant (50/50 mix with distilled water).
5. Bleed the system (Step 6 above) and run the UR800’s flow test again—ensure flow rate is 5-8 GPM. Clear P00B7.

7. P00B7 Repair Costs & Maintenance Tips

P00B7 repair costs for the F-150 3.5L EcoBoost vary by cause. Use this table to budget:

Maintenance Tips for F-150 3.5L EcoBoost Owners

• Raptor/Lariat (towing/off-roading): Replace the electric coolant pump every 80,000 miles (preventive) — TSB 21-2363 notes motor wear after heavy use.
• Flush the cooling system every 3 years/60,000 miles — use only Ford Super Duty Coolant (#VC-7-B) to avoid scale buildup in pump passages.
• Inspect the pump intake screen every 15,000 miles — clean with a wire brush if debris is visible (prevents clogging).
• Check coolant level monthly — low fluid strains the pump motor, accelerating wear. Top up with 50/50 coolant/distilled water.
• Perform the UR800’s Coolant System Health Check every 20,000 miles — monitor pump speed and flow rate to catch issues before P00B7 triggers.

8. F-150-Specific FAQs