Engine-Codes - Cadillac - P1604 Cadillac

P1604 Cadillac Code - Loss Of IPC Serial Data Conditions

- Code Popularity: 7,370 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P1604 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Instrument Panel Cluster (IPC)
  • Instrument Panel Cluster harness is open or shorted
  • Instrument Panel Cluster circuit poor electrical connection
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How to Fix the DTC P1604 Cadillac?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1604 Cadillac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1604 Cadillac Code Mean?

With the engine running engine speed over 500 rpm for 10 continuous seconds, the Powertrain Control Module (PCM) detects an invalid serial data signal or no serial data from the Instrument Panel Cluster (IPC) to PCM for 11 seconds.

P1604 Cadillac Code - Loss Of IPC Serial Data Conditions

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