P1140 Intake Valve Timing Control Performance Bank 1

OBD2 Code: P1140

Description: Intake Valve Timing Control Performance Bank 1

Definition: The P1140 code indicates a problem with the intake valve timing control system on bank 1 of the engine. This could be due to a malfunction in the variable valve timing (VVT) system, which is responsible for adjusting the timing of the intake valves to optimize engine performance and efficiency.

p1140 – Intake Valve Timing Control Performance Bank 1

Description: This code indicates a problem with the performance of the intake valve timing control for bank 1.

Typical Severity: Moderate

Common Causes

P1140 – Intake Valve Timing Control Performance Bank 1

Description: This code indicates a problem with the performance of the intake valve timing control for bank 1.

Common Causes:

• Faulty intake valve timing control solenoid
• Dirty or clogged oil passages related to the intake valve timing control system
• Incorrect oil viscosity or low oil level
• Mechanical issues with the intake valve timing control mechanism
• Wiring or connector problems in the intake valve timing control circuit

Common Misdiagnosis

OBD2 Code: P1140

Description: Intake Valve Timing Control Performance Bank 1

Common Misdiagnosis: Replacing the camshaft position sensor without checking for issues with the timing chain or belt.

Common Diagnostic Steps

OBD2 Code: P1140

Description: Intake Valve Timing Control Performance Bank 1

• Check for any additional trouble codes that may be present and address them first.
• Inspect the intake valve timing control solenoid for proper operation. Ensure it is not stuck or clogged.
• Verify the wiring and connectors to the intake valve timing control solenoid are secure and free from damage or corrosion.
• Test the oil pressure to ensure it meets manufacturer specifications, as low oil pressure can affect valve timing performance.
• Examine the camshaft position sensor for correct operation, as a faulty sensor can lead to incorrect timing adjustments.
• Check the engine oil level and condition; replace if necessary, as dirty or low oil can impact system performance.
• If equipped, inspect the variable valve timing (VVT) actuator for signs of wear or failure.
• Perform an engine mechanical inspection to rule out issues such as worn timing chain/belt or misaligned components.

Please note: These steps are general guidelines. Always refer to specific vehicle service manuals for detailed diagnostic procedures tailored to your vehicle model and year.