What could cause my Toyota Camry to stall while driving?

Certainly! A stalling issue in your 2018-present Toyota Camry (XV70) can be caused by various factors. Below are the symptoms, diagnostic steps, required tools, and repair instructions.

Required Tools

• OBD-II Scanner
• Fuel Pressure Gauge
• Multimeter
• Basic hand tools (screwdrivers, wrenches)
• Torque wrench
• Inspection mirror
• Safety goggles and gloves

Repair Instructions

Step 1: Retrieve Diagnostic Trouble Codes

• Connect an OBD-II scanner to the vehicle's diagnostic port.
• Turn the ignition to "ON" without starting the engine.
• Read and note any DTCs; investigate them based on manufacturer service manuals.

Step 2: Check Fuel Pressure

1. Locate the fuel rail on the engine.
2. Attach the fuel pressure gauge to the service port on the fuel rail.
3. Turn the ignition to "ON" and check the pressure reading against specifications (typically between 50-60 psi).
4. If the pressure is low, inspect the fuel pump and filter for issues.

Step 3: Inspect the Ignition System

1. Remove the spark plug wires and inspect the spark plugs for wear.
2. If necessary, replace the spark plugs with OEM parts.
3. Use a multimeter to test the ignition coils for resistance; replace if out of spec.

Step 4: Examine the Air Intake System

1. Remove the air filter and check for cleanliness; replace if dirty.
2. Clean the MAF sensor using MAF cleaner; follow the manufacturer's instructions for cleaning.
3. Ensure the throttle body is clean and operates freely.

Step 5: Check Engine Sensors

1. Using a multimeter, check the CKP and CMP sensors for proper voltage and resistance according to specifications.
2. If a sensor is faulty, replace it with an OEM part.

Step 6: Inspect for Vacuum Leaks

1. With the engine running, use a smoke machine or carburetor cleaner to check for vacuum leaks.
2. Replace any damaged hoses or gaskets found during inspection.

Conclusion

If the issue persists after performing the above checks and repairs, consider consulting with a certified technician or taking your vehicle to a dealership for further diagnostics. Stalling can sometimes be symptomatic of more complex issues that may require specialized equipment to diagnose accurately.