2021-2024 Toyota Camry & RAV4 MIL ON P140018 Tech Tip

Owners of 2021-2024 Toyota Camry and RAV4 vehicles may experience a 'MIL ON' condition, which can be either constant or intermittent. This warning light signals an issue within the vehicle's engine or hybrid system that requires attention. When this light appears, it is often accompanied by a specific diagnostic trouble code (DTC) that helps pinpoint the problem.

Symptoms

The primary symptom for affected 2021-2024 Toyota Camry and RAV4 vehicles is the illumination of the Malfunction Indicator Lamp (MIL), commonly known as the check engine light. This light may stay on continuously or appear intermittently. While the TSB does not specify other drivability concerns, any persistent warning light should prompt an inspection.

Fault Codes / DTCs

When the 'MIL ON' light illuminates for this specific issue, technicians will find the Diagnostic Trouble Code (DTC) P140018. This code is explicitly defined as "Exhaust Gas Recirculation 'A' Control Circuit 2 Circuit Current Below Threshold." The Exhaust Gas Recirculation (EGR) system is critical for reducing nitrogen oxide emissions by recirculating a portion of the engine's exhaust gas back into the engine cylinders. A "circuit current below threshold" typically points to an electrical issue within the EGR system's control circuit, such as a wiring problem, a faulty sensor, or a component malfunction.

Diagnosis and Technician Recommendations

Toyota's Tech Tip T-TT-0764-24 provides specific instructions for technicians encountering the Toyota Camry RAV4 P140018 issue. If this condition is observed, technicians are instructed to halt the standard diagnosis process and create a Technical Assistance System (TAS) Case. A TAS Case is a formal request for assistance from Toyota's technical support team, often used for complex or emerging issues that require manufacturer guidance.

Technicians are advised that if the condition occurs on a weekend or holiday, they may continue with diagnosis and repair. However, it is crucial to save all parts and detailed information related to the repair. This data collection is vital for Toyota to further investigate the root cause of the P140018 code and potentially develop broader solutions or updates. Technicians must contact TAS on the next available business day to report their findings and receive further instructions.

What Owners Should Do

If you own a 2021-2024 Toyota Camry or RAV4 and experience a 'MIL ON' light, especially if accompanied by symptoms of reduced performance or unusual engine behavior, it is important to have your vehicle inspected by a qualified Toyota service center. Mentioning the Toyota Camry RAV4 P140018 Tech Tip T-TT-0764-24 to your service advisor can help expedite the diagnostic process. Your dealership will follow the manufacturer's recommendations, which include creating a TAS Case to ensure the issue is properly documented and addressed according to Toyota's latest guidelines.

Source: NHTSA ID: 11010357, T-TT-0764-24