B0521 GMC - Tachometer Signal Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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B0521 GMC Possible Causes

  • Faulty Instrument Panel Cluster (IPC)
  • Instrument Panel Cluster (IPC) harness is open or shorted
  • Instrument Panel Cluster (IPC) circuit poor electrical connection

First diagnose B0521 GMC code

    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's pins.

Cost of diagnosing the B0521 GMC code

    Labor: 1.0

    The cost of diagnosing the B0521 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

B0521 GMC Possible Symptoms

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

B0521 Gmc Description

The Instrument Panel Cluster (IPC) receives engine RPM information from the Powertrain Control Module (PCM) on a dedicated engine speed input to IPC. IPC also receives engine RPM data on the serial data line. IPC monitors engine RPM output information sent from PCM for an out of range condition. The PCM sets the Diagnostic Trouble Code (DTC) when the IPC detects that the engine RPM is at least 7400 RPM.
OBDII Code B0521 Gmc - Tachometer Signal Circuit Malfunction - AutoCodes.com

B0521 GMC More Information

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B0521 GMC Comments

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