P216A — Fuel Injector Group "E" Supply Voltage Circuit/Open

P216A — Fuel Injector Group "E" Supply Voltage Circuit/Open. A fault in the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Typical causes: faulty fuel pressure regulator, vacuum or intake leaks skewing the mixture, weak fuel pump or clogged fuel filter.

powertrain (engine/transmission)

Is it safe to drive?

Drive with caution Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P216A is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
  4. Subsystem check Measure fuel pressure at the rail and compare with factory specification at idle and under load.
  5. Subsystem check Check short-term and long-term fuel trims in live data to see which way the mixture is off.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P216A does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P216A (parts and labor, USD, independent shop rates): Replace the fuel filter: $80–$200; Replace the pressure regulator or sensor: $150–$450; Replace the fuel pump: $400–$900; Clean or replace injectors: $200–$800. Overall, fixing P216A usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What is the most common cause of P216A?

The most common causes are: faulty fuel pressure regulator, vacuum or intake leaks skewing the mixture, weak fuel pump or clogged fuel filter.

How much does it cost to fix P216A?

Replace the fuel filter — $80–$200; Replace the pressure regulator or sensor — $150–$450; Replace the fuel pump — $400–$900; Clean or replace injectors — $200–$800. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What are the symptoms of P216A?

Drivers most often notice: rough idle and hesitation, hard starting or long cranking, loss of power under load, fuel smell in severe cases.

Will P216A clear itself?

Sometimes P216A clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

How do I diagnose P216A myself?

Start with a scan: confirm P216A, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the fuel delivery and mixture control, and verify the suspect component against live data before buying parts.

What does P216A mean?

Seeing P216A on your scanner? The control unit has caught the fuel delivery and mixture control operating outside its calibrated window. The formal description is “Fuel Injector Group "E" Supply Voltage Circuit/Open”, and the code is grouped under powertrain (engine/transmission) faults.

To set P216A, the control module compares live readings of the fuel delivery and mixture control against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.

What causes P216A?

  • clogged or leaking fuel injectors
  • faulty fuel pressure regulator
  • vacuum or intake leaks skewing the mixture
  • weak fuel pump or clogged fuel filter
  • contaminated or incorrect fuel

Common symptoms of P216A

  • rough idle and hesitation
  • hard starting or long cranking
  • loss of power under load
  • fuel smell in severe cases
  • Check Engine Light on
  • increased fuel consumption

How to diagnose P216A

  1. Connect an OBD2 scanner, confirm P216A is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
  4. Measure fuel pressure at the rail and compare with factory specification at idle and under load.
  5. Check short-term and long-term fuel trims in live data to see which way the mixture is off.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P216A does not return.

How to fix P216A

Start with the cheapest and most common causes before replacing expensive parts:

  • Replace the fuel filter — $80–$200
  • Replace the pressure regulator or sensor — $150–$450
  • Replace the fuel pump — $400–$900
  • Clean or replace injectors — $200–$800

How much does it cost to fix P216A?

Repair cost depends on which component actually failed. Typical scenarios for P216A (parts and labor, USD, independent shop rates):

  • Replace the fuel filter: $80–$200
  • Replace the pressure regulator or sensor: $150–$450
  • Replace the fuel pump: $400–$900
  • Clean or replace injectors: $200–$800

Overall, fixing P216A usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P216A?

Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.

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