P1213 — Injector Circuit Open / Shorted - Cylinder #6

OBD2 code P1213 flags a problem with the fuel delivery and mixture control (injector circuit open / shorted - cylinder #6). Short, gentle driving to a shop is usually possible. Common culprits: faulty fuel pressure regulator, faulty fuel rail pressure sensor or wiring, weak fuel pump or clogged fuel filter.

For Ford vehicles

cold start injector 1

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 P1213 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 P1213 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P1213 (parts and labor, USD, independent shop rates): Replace the fuel pump: $400–$900; Clean or replace injectors: $200–$800; Replace the fuel filter: $80–$200; Replace the pressure regulator or sensor: $150–$450. Overall, fixing P1213 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 do I diagnose P1213 myself?

Start with a scan: confirm P1213, 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.

Will P1213 clear itself?

Sometimes P1213 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.

What are the symptoms of P1213?

Drivers most often notice: rough idle and hesitation, loss of power under load, increased fuel consumption, fuel smell in severe cases.

What is the most common cause of P1213?

The most common causes are: faulty fuel pressure regulator, faulty fuel rail pressure sensor or wiring, weak fuel pump or clogged fuel filter.

Is it safe to drive with P1213?

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

P1213 points to an electrical problem with the fuel injector for cylinder number six. Specifically, the powertrain control module has detected either an open circuit or a short circuit in the wiring that commands that particular injector. Fuel injectors are solenoid valves controlled by the engine computer: when the PCM energizes the injector, it opens for a precisely timed interval to spray atomized fuel into the intake port. If the circuit feeding cylinder six's injector cannot complete that electrical loop reliably, the injector either stays shut or fires at the wrong time, disrupting the air-fuel mixture for that cylinder.

The engine control unit does not log P1213 on a single anomaly. It runs multiple verification checks under specific operating conditions—usually during a drive cycle that includes warm-up, acceleration, and steady cruise—before lighting the check engine lamp. When the module finally flags P1213, it also records a freeze frame snapshot: engine load, RPM, coolant temperature, and vehicle speed at the exact moment the fault occurred. That snapshot gives you a starting point for recreating the failure condition during diagnosis.

Symptoms of P1213

Cylinder six contributes roughly one-sixth of the engine's total power output. When that contribution drops or disappears, the imbalance makes itself known in several ways:

  • Rough idle that feels like the engine is chugging or missing
  • Noticeable hesitation or stumble when you push the accelerator
  • Reduced engine power, especially under load such as climbing a hill or passing
  • Fuel consumption climbing above your normal average
  • A raw fuel odor noticeable around the tailpipe or in the cabin in more severe cases
  • Extended cranking time when you first start the engine
  • The check engine light illuminated on the dashboard

Common causes of P1213

The fault can originate anywhere along the injector circuit or in the systems that feed it. Plausible culprits, roughly ordered from most to least frequent:

  • Damaged or corroded wiring harness and connectors feeding the cylinder six injector
  • A faulty fuel pump unable to maintain adequate rail pressure
  • A clogged fuel filter restricting flow to the injectors
  • Dirty or clogged fuel injectors that no longer spray properly
  • A malfunctioning fuel rail pressure sensor sending incorrect data to the PCM
  • Vacuum leaks downstream of the throttle body skewing the air side of the mixture ratio
  • A defective fuel pressure regulator allowing pressure to drift out of spec

How to diagnose P1213

A systematic approach keeps you from throwing parts at the problem blindly.

  1. Scan and record — Connect a quality OBD2 scanner, confirm P1213 is stored, and capture the freeze frame data before clearing anything. This data shows the engine conditions (load, RPM, temperature, speed) when the module first detected the fault.
  2. Check for related codes and TSBs — Scan for any other stored codes. P0100-series mass air flow codes, P0170 fuel trim codes, or other injector-related P1200-series codes often point to the root cause. Also search your manufacturer's technical service bulletins using your VIN; some P0xxx codes have published factory fixes or PCM updates.
  3. Inspect the injector circuit visually — With the engine off, unplug the connector at cylinder six's injector and the PCM connector. Look for broken wires, pinched insulation, corrosion at the terminals, or loose connections. Wiggle the harness while monitoring the scanner's live data to see if the fault reappears.
  4. Test injector resistance — Use a multimeter to measure the winding resistance of the cylinder six injector. Compare against factory spec (typically 12–16 ohms for a saturated injector). An out-of-range reading confirms an internal fault in the injector.
  5. Verify fuel pressure — Hook up a fuel pressure gauge to the rail. Check static pressure with the engine running and compare to specifications for both idle and under load. Low pressure suggests a pump, filter, or regulator issue; fluctuating pressure points toward a regulator or failing pump.
  6. Drive cycle verification — After any repair, clear P1213, complete a full drive cycle that reproduces the freeze frame conditions, and confirm the code does not return.

Repair options and costs

Diagnostic findings determine which fix applies. Parts and labor estimates below reflect typical independent shop rates in USD.

  • Fuel pump replacement — $400 to $900, depending on whether the tank needs to be dropped and on your vehicle's make
  • Fuel injector cleaning or replacement — $200 to $800; cleaning a stubborn injector is cheaper; outright replacement of a faulty unit runs higher
  • Fuel filter replacement — $80 to $200 for parts and labor on most models
  • Fuel pressure regulator or sensor replacement — $150 to $450 depending on location and part cost

Can you drive with P1213?

Drive with caution. Cylinder six's contribution is missing, so the engine runs unevenly. That imbalance can cause stalling, dangerous hesitation during acceleration, and—if the air-fuel mixture stays consistently rich—potential damage to the catalytic converter over time. Do not plan a long highway trip until the underlying cause is identified and corrected.

Related OBD2 codes