P0216⛽ Fuel injection / diesel injection pump timingStop and fix promptly

P0216: Injection Timing Control Circuit Malfunction (Meaning, Causes, Fixes)

Reviewed 2026-10-26 · Based on 2 cited source(s)

What P0216 means

The engine computer (PCM) controls when fuel is injected into each cylinder. RepairPal defines P0216 as an Injector/Injection Timing Control Circuit fault and explains that the PCM is programmed to cut off the injectors in certain conditions, such as braking or deceleration; if it activates the injectors at the wrong time, P0216 is set. OBD-Codes.com describes the same code from the diesel side: the diesel fuel injection pump has a timing failure, either because the pump timing needs adjusting or because of an internal pump failure that can't be adjusted. The code is generic to OBD-II vehicles, but the repair steps vary by make and model. Search interest shows people look it up mostly for diesel trucks, including the Dodge Cummins (VP44 pump), Chevy Duramax, GM 6.5 diesel and VW TDI, so check technical service bulletins (TSBs) for your vehicle.

Severity: can I keep driving?

Stop and fix promptly

Get it diagnosed soon. RepairPal rates P0216 'Urgent', meaning it can cause severe damage, and OBD-Codes.com warns that on Dodge Ram trucks with the Cummins diesel, the fuel delivery problems that often cause this code can go on to ruin the injection pump if they are left alone. The engine may also stall or fail to restart, so avoid long trips until it is checked. Diesel fuel systems run at high pressure: never loosen injection lines with the engine running, and let the engine cool before working near it.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. Failed injection pump, most often damaged by poor fuel delivery (OBD-Codes.com says this is the most frequent cause)
  2. Plugged diesel fuel filter
  3. Blockage inside the fuel tank
  4. Air in the fuel from a cracked fuel line inside the tank above the fuel level
  5. Weak or failed transfer (lift) pump
  6. Injection pump out of time
  7. Failed engine computer (PCM), or PCM software that needs updating (the only common causes RepairPal lists)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Read all stored codes and note any fuel pressure or crankshaft and camshaft sensor codes that set with it.
  2. Look up technical service bulletins for your year, make and model, including any PCM software updates (RepairPal lists outdated PCM software as a cause).
  3. Think back to recent work. OBD-Codes.com says that if the code or the symptoms appeared right after a routine fuel filter change, suspect the transfer (lift) pump, because a weak pump can keep a running engine fed but may not re-prime the system after the filter is changed.
  4. Replace the diesel fuel filter if it is due or you suspect it is plugged.
  5. Check whether your injection pump timing is adjustable; OBD-Codes.com says to check and adjust it if so, using the factory procedure for your engine.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • OBD-Codes.com describes a lift pump volume test and a fuel pressure check for Dodge Ram trucks with the Cummins engine, done by disconnecting the fuel hose at the injection pump and collecting fuel in an approved container while the engine is bumped over. The figures it gives are specific to that truck, so use the factory specification for your engine.
  • The sources differ: OBD-Codes.com treats P0216 as a diesel injection pump timing problem usually caused by poor fuel delivery, while RepairPal's common causes are limited to a failed PCM or PCM software that needs updating. Rule out the fuel supply and pump before replacing the PCM.
  • Injection pump timing and replacement on modern diesels usually need special tools and a scan tool, and are best left to a diesel shop.
  • OBD-Codes.com notes that aftermarket kits exist to warn the driver when fuel pressure or volume drops to a level that could damage the injection pump.

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Can I drive with P0216?

Only as much as you need to. RepairPal rates it 'Urgent', and OBD-Codes.com warns that prolonged fuel delivery problems, a common cause on the Dodge Cummins, can make the injection pump fail. The engine may also stall or not restart, so get it checked soon.

Does P0216 mean I need a new injection pump?

Not necessarily. OBD-Codes.com says the pump timing may only need adjusting, or the real problem may be fuel delivery, such as a plugged filter, a blocked tank or a weak lift pump. RepairPal lists the engine computer and its software as common causes. Check the fuel supply first; if the pump has failed, fix the supply too so the new pump isn't damaged.

Why did P0216 show up after I changed my fuel filter?

OBD-Codes.com says this points to the transfer (lift) pump. A weak lift pump can still feed a running engine, but once the system loses its prime during a filter change, it may not deliver enough fuel to restart.

Is P0216 only a diesel code?

OBD-Codes.com describes it in terms of the diesel injection pump, and search interest is almost all diesel trucks (Cummins, Duramax, GM 6.5, VW TDI). RepairPal's generic definition is about the engine computer switching the injectors at the wrong time. Check a service manual or TSB for your vehicle.

Sources

  1. OBD-Codes.com: P0216 Injection Timing Control Circuit Malfunction
  2. RepairPal: P0216 Injector/Injection Timing Control Circuit (rated Urgent)

Last reviewed 2026-10-26. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.