Code 57-xx P1 Open or 58-xx P2 Open - Pressure transducer signal wire is open.

What does 57-01 / 57-41 / 58-01 / 58-41 mean?

This fault indicates that the signal wire for pressure transducer P1 (codes 57-xx) or P2 (codes 58-xx) is 'open,' meaning it's returning more than 4.5V DC. This typically occurs if the sensor wire is disconnected, causing the PCM to pull the signal voltage to +5V DC.

• Disconnected sensor wire for P1 or P2 transducer.
• Power wire not supplying +5V DC to the transducer.
• Signal wire not returning DC Voltage between 0.5-4.5 VDC.
• Faulty pressure transducer part.

Click steps to track your progress.

1. 1

   Visually inspect the wiring harnesses for pressure transducers P1 and P2, focusing on the green signal wire (GRN).

2. 2

   Ensure the sensor wire is securely connected to both the transducer and the PCM board.

3. 3

   Verify that the red power wire (RED) is supplying +5V DC and the green signal wire (GRN) is returning a DC voltage between 0.5-4.5 VDC.

4. 4

   If connections and voltages appear correct, the pressure transducer itself may be faulty and require replacement by a technician.