B0521 - Tachometer Signal Circuit Malfunction
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
Cost of diagnosing the B0521 code
The cost of diagnosing 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.
B0521 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
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.
B0521 Information for specific makes