P0135 on the All-New 2024 Ford Ranger
The 2024 Ford Ranger is a complete redesign, though it retains the proven 2.3-liter EcoBoost turbocharged four-cylinder engine producing 270 horsepower and 310 lb-ft of torque. A P0135 code on this new platform indicates the upstream O2 sensor heater circuit has malfunctioned. The sensor sits between the exhaust manifold and turbocharger on this single-bank inline-four engine.
New Platform, Proven Engine
While the 2024 Ranger is a new platform with updated chassis, body, and technology, the 2.3L EcoBoost engine carries over from the previous generation. The exhaust system routing and sensor positioning may differ slightly on the new platform, but the basic sensor design and heater circuit operation are similar. A P0135 on a brand-new truck points to a random component defect.
Causes
- Manufacturing defect in sensor (High Likelihood): The Motorcraft OEM sensor may have a heater element flaw. Even with proven engine components, the new platform's exhaust routing and heat management may introduce different thermal profiles that affect the sensor.
- New platform wiring routing issue (Medium Likelihood): First-year production on a new platform can have wiring routing differences that expose the sensor harness to unexpected heat or contact points. The new Ranger's redesigned chassis may route wiring differently than the outgoing model.
- Blown fuse (Medium Likelihood): Check the power distribution box under the hood. Quick and free to diagnose.
- Connector issue from assembly (Low Likelihood): New vehicle assembly can occasionally leave connectors not fully engaged. Vibration from normal driving loosens marginally seated connections.
Warranty Repair
The 2024 Ranger is under complete warranty coverage. The O2 sensor is covered under the federal emissions warranty for 8 years or 80,000 miles. Take it to your Ford dealer for a free repair. First-year production vehicles may also benefit from any TSBs or design improvements Ford has identified since launch.
Cost Reference
Under warranty: free. Future reference: Motorcraft sensor $65 to $130, shop labor $100 to $180, total $165 to $310. The new platform's body-on-frame design should continue to provide good underbody access for DIY after warranty expires.
New Truck Care
Getting P0135 on a new truck can be frustrating, but it is a minor isolated issue. The sensor replacement takes about an hour at the dealer and restores full engine management capability. Since the 2024 Ranger's 2.3L EcoBoost is a proven engine, one defective sensor does not indicate broader reliability concerns. Fix it under warranty and enjoy the new Ranger's capabilities.