P216E — Fuel Injector Group "F" Supply Voltage Circuit Low

OBD2 code P216E flags a problem with the fuel delivery and mixture control (fuel injector group "F" supply voltage circuit low). Short, gentle driving to a shop is usually possible. Common culprits: faulty fuel rail pressure sensor or wiring, contaminated or incorrect fuel, faulty fuel pressure regulator.

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 P216E 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 Check for supply voltage at the fuel injector group "F" supply voltage connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
  5. Subsystem check Measure fuel pressure at the rail and compare with factory specification at idle and under load.
  6. Subsystem check Check short-term and long-term fuel trims in live data to see which way the mixture is off.
  7. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P216E does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P216E (parts and labor, USD, independent shop rates): Clean or replace injectors: $200–$800; Replace the pressure regulator or sensor: $150–$450; Replace the fuel pump: $400–$900; Replace the fuel filter: $80–$200. Overall, fixing P216E 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

How much does it cost to fix P216E?

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

How do I diagnose P216E myself?

Start with a scan: confirm P216E, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the fuel injector group "F" supply voltage, and verify the suspect component against live data before buying parts.

What does OBD2 code P216E mean?

OBD2 code P216E flags a problem with the fuel delivery and mixture control (fuel injector group "F" supply voltage circuit low). Short, gentle driving to a shop is usually possible. Common culprits: faulty fuel rail pressure sensor or wiring, contaminated or incorrect fuel, faulty fuel pressure regulator.

What is the most common cause of P216E?

The most common causes are: faulty fuel rail pressure sensor or wiring, contaminated or incorrect fuel, faulty fuel pressure regulator.

Is it safe to drive with P216E?

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

What does P216E mean?

P216E is logged by the onboard diagnostics when the fuel delivery and mixture control does not behave as expected. The official definition is “Fuel Injector Group "F" Supply Voltage Circuit Low”. This is a powertrain (engine/transmission) category code.

“Circuit low” means the voltage on the fuel injector group "F" supply voltage circuit stays below the expected minimum — close to ground. The usual physical reasons are a short to ground, a chafed wire touching metal, a missing supply voltage, or a failed component dragging the signal down.

To set P216E, 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.

Common symptoms of P216E

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

What causes P216E?

  • signal wire shorted to ground (chafed insulation)
  • missing supply voltage to the fuel injector group "F" supply voltage
  • failed fuel injector group "F" supply voltage pulling the signal low
  • clogged or leaking fuel injectors
  • vacuum or intake leaks skewing the mixture
  • faulty fuel pressure regulator
  • weak fuel pump or clogged fuel filter

How to diagnose P216E

  1. Connect an OBD2 scanner, confirm P216E 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. Check for supply voltage at the fuel injector group "F" supply voltage connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
  5. Measure fuel pressure at the rail and compare with factory specification at idle and under load.
  6. Check short-term and long-term fuel trims in live data to see which way the mixture is off.
  7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P216E does not return.

How to fix P216E

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

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

How much does it cost to fix P216E?

Repair cost depends on which component actually failed. Typical scenarios for P216E (parts and labor, USD, independent shop rates):

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

Overall, fixing P216E 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 P216E?

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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