Line Pressure Check Procedure: Evaluation

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Compare the line pressure test results with the Line Pressure Results in the following table. If the line pressure is not as specified, refer to the Line Pressure Test Diagnosis for further evaluation.

Line Pressure Results

Engine Running at	R Range Line Pressure	D, 2, L Range Line Pressure
Idle Speed (600-700 RPM)	553-623 kPa (80-100 psi	372-412 kPa (54-60 psi)
Stall Speed (2400-2700 RPM)	1,764-1,964 kPa (256-284 psi	1,126-1,226 kPa (164-178 psi)

Line Pressure Test Diagnosis

Line Pressure Measurement	Probable Cause
Higher than Specification in Drive (D) and Reverse (R) Ranges	Pressure regulator valve malfunction Throttle valve malfunction Out of adjustment accelerator
Lower than Specification in Drive (D) and Reverse (R) Ranges	Fluid pump malfunction Pressure regulator valve malfunction Throttle valve malfunction Out of adjustment accelerator cable
Lower than Specification in Drive (D) Range Only	Forward clutch fluid circuit leak Drive (D) range fluid circuit leak
Lower than Specification in Reverse (R) Range Only	Direct clutch fluid circuit leak 1st-reverse brake fluid circuit leak Reverse (R) range fluid circuit leak