P216C 2016 Chevrolet Silverado Code - Cylinder 5 Injector High Control Circuit High Voltage

Code P216C indicates a high voltage issue in the high control circuit for Cylinder 5's fuel injector, meaning the electrical signal is outside the expected range.

Symptoms may include rough idling, misfires, reduced engine power, poor fuel economy, and an illuminated check engine light.

Possible causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning engine control module (ECM), or corrosion in the electrical connections.

Driving with a P216C code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to the catalytic converter if unaddressed.

Start by inspecting the wiring and connectors for Cylinder 5's injector, checking for damage or corrosion. Use a multimeter to test the circuit's voltage and continuity. If no issues are found, test the injector itself.

Basic tools include a multimeter for electrical testing, a scan tool for diagnostics, and potentially a replacement injector or ECM, depending on the root cause of the issue.

Costs vary, but replacing a fuel injector typically ranges from $150 to $300, while wiring repairs may cost less. ECM replacement can cost $500 or more, depending on labor and parts.

Yes, a malfunctioning engine control module can cause incorrect voltage signals, leading to a P216C code.

Use an OBDII scan tool to clear the code after completing repairs. Ensure the issue is resolved to prevent the code from returning.

Ignoring this code can result in poor engine performance, increased emissions, potential damage to the catalytic converter, and long-term engine problems.