What is the 2009-2016 Ford Flex Electronic Throttle Body Failure Causes Limp Mode (P2111/P2112/P2119)?

The electronic throttle body on the 3.5L/3.7L Cyclone V6 uses a plastic-geared motor and integrated throttle position sensors. Contamination, gear wear and sensor drift cause the PCM to lose confidence in commanded vs. actual plate position, triggering failsafe cooling mode. The… Repairs typically run $300-$700. Severity: high.

What is the 2009-2019 Ford Flex Brake Booster Check Valve Failure?

The brake booster check valve fails, allowing vacuum to leak and causing a hard brake pedal and longer stopping distances. Some owners report a hissing sound from the brake area when pressing the pedal. Repairs typically run $50-$600. Severity: high.

What is the 2009-2019 Ford Flex Power Transfer Unit (PTU) Seal Leaks and AWD System Failure?

AWD-equipped Ford Flex models suffer from chronic Power Transfer Unit (PTU) seal leaks and eventual PTU failure. The PTU transfers power from the transaxle to the rear driveshaft and is sealed with halfshaft seals that deteriorate over time. When the seals leak, the PTU fluid lev… Repairs typically run $300-$2,500. Severity: medium.

What is the 2009-2019 Ford Flex Vista Roof Drain Tube Blockage and Disconnection Floods the Headliner?

The multi-panel Vista Roof is not sealed against water - it relies on a drip tray and four drain tubes that route water down the A- and C-pillars. On the Flex those tubes are prone to being crimped, kinked or, in some documented warranty cases, never connected at the factory at a… Repairs typically run $150-$900. Severity: medium.

What is the 2009-2019 Ford Flex Front and Rear Wheel Hub Bearing Failure With Corrosion-Welded Hubs?

Sealed hub bearing assemblies on the Flex wear out and produce a speed-dependent noise that owners consistently describe as starting like a hum and progressing to a sound like aggressive snow tires, usually first noticed above 40 mph and changing pitch when the vehicle is loaded… Repairs typically run $230-$600. Severity: medium.

What is the 2009-2019 Ford Flex Power Liftgate Motorized Struts Weaken and Overload the Lift Motor?

On power-liftgate Flexes the gate is raised by two electric struts working with the drive motor and control module. The gas charge and internal drive in the struts weakens with age and cold weather, so the gate opens slowly, stops partway, reverses as though it detected an obstru… Repairs typically run $200-$900. Severity: low.

What is the 2009-2019 Ford Flex Door Ajar Warning Stays On?

The door ajar warning stays illuminated even with all doors closed, draining the battery if interior lights stay on overnight. Caused by faulty door latch switches that corrode or stick. Repairs typically run $30-$250. Severity: low.

What is the 2009-2019 Ford Flex HVAC Blend Door Actuator Gear Stripping Causes Clicking and Split Cabin Temperatures?

The Flex uses several small plastic-geared HVAC actuators (driver blend, passenger blend, mode/panel-floor-defrost, and recirculation) behind the dash, plus additional units for the rear climate zone. The position feedback potentiometer inside the actuator degrades and stops repo… Repairs typically run $120-$700. Severity: low.

Ford · Known Issues

2009 Ford Flex Problems: 12 Known Issues

2009 model year · 1,120+ owner reports · Updated September 2026

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According to Au7o's analysis of 1,120+ owner reports, the 2009 Ford Flex has 12 documented known issues, with 6 rated critical. The most serious are Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage ($1,500-$7,000 repair), Electric Power Steering (EPS) Failure and Assist Loss ($300-$1,300 repair), Timing Chain, Guide and VCT Phaser Wear Causes Cold-Start Rattle on the 3.5 Cyclone ($1,800-$4,000 repair), Electronic Throttle Body Failure Causes Limp Mode (P2111/P2112/P2119) ($300-$700 repair), Brake Booster Check Valve Failure ($50-$600 repair) and Torque Converter Clutch Shudder and TCC Solenoid Contamination in the 6F50/6F55 ($1,200-$4,500 repair). The most commonly reported issue is Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage with 480 owner reports. Across all issues with published estimates, repair costs range from $30 to $7,000. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Ford Flex problems?

According to Au7o's analysis of 1,120+ owner reports, the 2009 Ford Flex has 12 documented issues. The most frequently reported are: Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage, Electric Power Steering (EPS) Failure and Assist Loss, Timing Chain, Guide and VCT Phaser Wear Causes Cold-Start Rattle on the 3.5 Cyclone. Of these, 6 are rated critical and should be addressed promptly.

Is the Ford Flex reliable?

The 2009 Ford Flex has 12 known issues documented across 1,120+ owner reports. 6 issues are rated critical: Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage and Electric Power Steering (EPS) Failure and Assist Loss and Timing Chain, Guide and VCT Phaser Wear Causes Cold-Start Rattle on the 3.5 Cyclone and Electronic Throttle Body Failure Causes Limp Mode (P2111/P2112/P2119) and Brake Booster Check Valve Failure and Torque Converter Clutch Shudder and TCC Solenoid Contamination in the 6F50/6F55. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Ford Flex problems?

Repair costs for known Ford Flex issues range from $30 to $7,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage, typically costs $1,500-$7,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2009-2019 Ford Flex Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage?

The 3.5L Duratec and 3.5L EcoBoost V6 engines in the Ford Flex have a critical design flaw: the water pump is driven by the timing chain and mounted internally inside the engine. When the water pump seal fails, coolant leaks directly into the engine oil, creating a milky sludge t… Repairs typically run $1,500-$7,000. Severity: high.

All 12 Known Issues

Other Ford Models

Frequently Asked Questions

What are the most common Ford Flex problems?

Is the Ford Flex reliable?

How much does it cost to fix common Ford Flex problems?

What is the 2009-2019 Ford Flex Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage?

What is the 2009-2013 Ford Flex Electric Power Steering (EPS) Failure and Assist Loss?

2009-2019 Ford Flex: Internal Water Pump Failure Causes Coolant-Oil Mixing and Catastrophic Engine Damage#

2009-2019 Ford Flex: Timing Chain, Guide and VCT Phaser Wear Causes Cold-Start Rattle on the 3.5 Cyclone#

2009-2016 Ford Flex: Electronic Throttle Body Failure Causes Limp Mode (P2111/P2112/P2119)#

2009-2013 Ford Flex: Electric Power Steering (EPS) Failure and Assist Loss#

2009-2019 Ford Flex: Front and Rear Wheel Hub Bearing Failure With Corrosion-Welded Hubs#

2009-2019 Ford Flex: Brake Booster Check Valve Failure#

2009-2019 Ford Flex: Torque Converter Clutch Shudder and TCC Solenoid Contamination in the 6F50/6F55#

2009-2019 Ford Flex: Vista Roof Drain Tube Blockage and Disconnection Floods the Headliner#

2009-2019 Ford Flex: Power Liftgate Motorized Struts Weaken and Overload the Lift Motor#

2009-2019 Ford Flex: Power Transfer Unit (PTU) Seal Leaks and AWD System Failure#

2009-2019 Ford Flex: Door Ajar Warning Stays On#

2009-2019 Ford Flex: HVAC Blend Door Actuator Gear Stripping Causes Clicking and Split Cabin Temperatures#

What is the 2009-2019 Ford Flex Timing Chain, Guide and VCT Phaser Wear Causes Cold-Start Rattle on the 3.5 Cyclone?