2021-2024 Toyota Camry & RAV4 MIL ON P140018

Symptoms

Owners of 2021-2024 Toyota Camry and RAV4 vehicles may observe a Malfunction Indicator Lamp (MIL) illuminating on their dashboard. This light, commonly known as the "Check Engine" light, might be constantly on or appear intermittently, signaling a potential issue within the vehicle's engine or hybrid system.

Fault Codes / DTCs

When the MIL is illuminated, a diagnostic scan tool will likely reveal the presence of Diagnostic Trouble Code (DTC) P140018. This code is specifically defined as "Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold." This issue, often searched as Toyota Camry P140018, points to an electrical problem within the Exhaust Gas Recirculation (EGR) system, indicating that the control circuit for the EGR system's second circuit is experiencing a current reading that falls below the expected operational threshold. This DTC is typically stored in the Engine Control module or the Engine/Hybrid System module.

Diagnosis and Trigger Conditions

Toyota's Tech Tip outlines a specific protocol for technicians when a 2021-2024 Toyota Camry or RAV4 presents with a "MIL ON" condition accompanied by DTC P140018. Instead of immediately following standard diagnostic flowcharts, technicians are instructed to "halt diagnosis" and create a Technical Assistance System (TAS) Case. A TAS Case is Toyota's internal method for documenting and escalating complex or emerging issues to factory technical experts, ensuring consistent and accurate repairs.

Repair Protocol

Upon observing the MIL ON and DTC P140018, the technician's protocol includes several key steps. First, standard diagnostic procedures are to be paused to ensure the issue is addressed through the proper escalation channel. A TAS Case must be created immediately to notify Toyota's technical support team. The Tech Tip also specifies that if the condition is observed on a weekend or holiday, technicians should still "continue with diagnosis and repair" to avoid delaying the customer, but the TAS Case must still be created and followed up on the next available business day. Crucially, technicians are instructed to "save all parts and/or details" related to the diagnosis and repair. This ensures that comprehensive information is available for review by TAS, which helps Toyota track potential trends or widespread issues with the Exhaust Gas Recirculation system.

Owner Action

If you own a 2021-2024 Toyota Camry or RAV4 and experience a "MIL ON" light on your dashboard, especially if it's persistent or intermittent, it is important to have your vehicle inspected promptly. The presence of DTC P140018, "Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold," suggests a specific issue that your Toyota dealership is equipped to address.

Contact your authorized Toyota service center to schedule an appointment. Inform them about the illuminated MIL and mention the potential for a Toyota Camry P140018 diagnostic trouble code. Your dealership will follow the manufacturer's recommended procedures, which include consulting with Toyota's Technical Assistance System (TAS) to ensure the correct diagnosis and repair are performed, potentially involving the preservation of parts and detailed information for expert review.

Source: NHTSA ID 11010071