P1604 Loss of IPC Serial Data Conditions

• OBD2 Code: P1604
• Description: Loss of IPC (Instrument Panel Cluster) serial data conditions.
• Definition: This code indicates a communication issue between the vehicle’s control modules and the instrument panel cluster, resulting in a loss of serial data transmission. It may affect the display or functionality of gauges and warning lights on the dashboard.

p1604 – Loss of IPC Serial Data Conditions

Typical Severity: Moderate

Common Causes

p1604 – Loss of IPC Serial Data Conditions

Common causes:

• Faulty instrument cluster module
• Wiring issues between the instrument cluster and the PCM
• Interference from other electronic devices affecting serial communication
• PCM software issue

 

Common Misdiagnosis

OBD2 Code: P1604

Description: Loss of IPC Serial Data Conditions

Common Misdiagnosis: Faulty Instrument Panel Cluster (IPC) when the issue may actually be due to a poor connection or wiring problem in the data communication lines.

 

Common Diagnostic Steps

OBD2 Code: P1604

Description: Loss of IPC Serial Data Conditions

Common Diagnostic Steps:

• Check for any other stored trouble codes that may be related to communication issues.
• Inspect the wiring and connectors between the Instrument Panel Cluster (IPC) and the Powertrain Control Module (PCM) for damage or corrosion.
• Verify proper voltage and ground at the IPC connector using a multimeter.
• Test the data bus communication lines for continuity and resistance.
• Use a scan tool to check if the IPC is receiving data from other modules on the network.
• If equipped, perform a module reset or reprogramming as per manufacturer guidelines.
• If all else fails, consider replacing the IPC after confirming it is not functioning correctly with diagnostic equipment.