P1142 Load Calculation Cross Check Lower Limit Exceeded

OBD-II Code P1142: This code indicates that the engine control module (ECM) has detected a discrepancy in the load calculation, where the calculated load is below the expected lower limit.

p1142 Load Calculation Cross Check Lower Limit Exceeded

Typical Severity: Moderate

Common Causes

P1142 – Load Calculation Cross Check Lower Limit Exceeded

Common causes:

• Faulty mass air flow sensor
• Vacuum leaks in the intake system
• Dirty or clogged air filter
• Fuel delivery issues such as a faulty fuel pump or injectors
• Issues with the engine’s mechanical components, such as low compression or timing problems

 

Common Misdiagnosis

OBD2 Code: P1142

Description: Load Calculation Cross Check Lower Limit Exceeded

Common Misdiagnosis: Faulty Mass Air Flow (MAF) Sensor, Dirty or Faulty Throttle Body, Vacuum Leaks, Incorrectly Installed or Damaged Air Intake System Components.

 

Common Diagnostic Steps

OBD2 Code: P1142

Description: Load Calculation Cross Check Lower Limit Exceeded

Common Diagnostic Steps:

• Verify the code with an OBD-II scanner and clear it to see if it returns.
• Inspect the Mass Air Flow (MAF) sensor for dirt or damage; clean or replace if necessary.
• Check for vacuum leaks in the intake system, including hoses and gaskets.
• Examine the throttle position sensor (TPS) for proper operation and calibration.
• Test the manifold absolute pressure (MAP) sensor for correct readings.
• Ensure that all related wiring and connectors are secure and free from corrosion or damage.
• If equipped, check the turbocharger or supercharger systems for proper function.
• Perform a comprehensive engine performance test to identify any underlying issues affecting load calculation.