B0521 Possible Causes
- Faulty Instrument Panel Cluster (IPC)
- Instrument Panel Cluster (IPC) harness is open or shorted
- Instrument Panel Cluster (IPC) circuit poor electrical connection
How is the B0521 code repair?
Start by checking 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.What is the cost to diagnose the B0521 code
Labor: 1.0
The cost to diagnose the B0521 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0521 Meaning
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.More Information
Need more information on how to fix the B0521 code?Get Access to Factory Service Manuals
Information for specific makes
- B0521 BUICK Tachometer Signal Circuit Malfunction
- B0521 CADILLAC Tachometer Signal Circuit Malfunction
- B0521 CHEVROLET Tachometer Signal Circuit Malfunction
- B0521 GMC Tachometer Signal Circuit Malfunction