P0216 Mercedes-Benz Code - Injection Timing Control Circuit Malfunction

P0216 indicates an "Injection Timing Control Circuit Malfunction," meaning the engine control module (ECM) has detected an issue with the fuel injection timing.

Symptoms may include rough idling, reduced engine performance, difficulty starting, poor fuel economy, and, in some cases, the engine stalling.

Common causes include a faulty injection pump, defective fuel injectors, damaged wiring or connectors in the injection timing circuit, or a failing engine control module (ECM).

Yes, driving with this code can cause further engine damage or reduced performance due to improper fuel injection timing, so it’s best to address it promptly.

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the wiring and connectors for damage, testing the injection pump, and checking for proper fuel injector operation.

Yes, this code is more commonly associated with diesel engines, as they rely heavily on precise injection timing for proper operation.

Repair costs vary widely, from $100 for simple wiring repairs to over $1,000 if the injection pump or ECM needs replacement.

While a dirty fuel filter is not a direct cause, it can restrict fuel flow, potentially leading to issues that trigger the code over time.

You’ll need an OBDII scanner, a multimeter to check electrical circuits, and possibly specialized tools to test or replace the injection pump or injectors.

Regular maintenance, such as replacing the fuel filter, using high-quality fuel, and inspecting the injection system for wear or damage, can help prevent this code.