P2316 — Ignition Coil "F" Primary Control Circuit High

OBD2 code P2316 flags a problem with the ignition system (ignition coil "F" primary control circuit high). Short, gentle driving to a shop is usually possible. Common culprits: worn spark plugs or wrong plug gap, moisture or oil in the spark plug wells, failed ignition coil or coil pack.

powertrain (engine/transmission)

Is it safe to drive?

Drive with caution Drive with caution and avoid load. Ignition faults cause misfires that quickly overheat and destroy the catalytic converter; if the Check Engine Light flashes, stop and fix it first.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P2316 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the ignition system for damage, corrosion, chafing or poor contact.
Subsystem check With the ignition coil "F" primary control disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
Subsystem check Swap the coil to another cylinder and see if the fault code follows it.
Subsystem check Inspect spark plugs for wear, oil or carbon tracks and check plug gaps.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2316 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2316 (parts and labor, USD, independent shop rates): Replace an ignition coil: $150–$380; Replace spark plugs: $90–$250; Repair coil wiring or connector: $80–$250. Overall, fixing P2316 usually costs between $80 and $380. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P2316 clear itself?

Sometimes P2316 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.

Is it safe to drive with P2316?

Drive with caution and avoid load. Ignition faults cause misfires that quickly overheat and destroy the catalytic converter; if the Check Engine Light flashes, stop and fix it first.

What is the most common cause of P2316?

The most common causes are: worn spark plugs or wrong plug gap, moisture or oil in the spark plug wells, failed ignition coil or coil pack.

How do I diagnose P2316 myself?

Start with a scan: confirm P2316, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the ignition coil "F" primary control, and verify the suspect component against live data before buying parts.

What are the symptoms of P2316?

Drivers most often notice: loss of power and jerking, hard starting, especially in damp weather, Check Engine Light on, increased fuel consumption.

What does P2316 mean?

Seeing P2316 on your scanner? The control unit has caught the ignition system operating outside its calibrated window. The formal description is “Ignition Coil "F" Primary Control Circuit High”, and the code is grouped under powertrain (engine/transmission) faults.

“Circuit high” means the control module sees a voltage on the ignition coil "F" primary control circuit that is above the expected range — typically close to battery voltage. Physically this points to a short to a power feed, a broken ground return, or a failed component pulling the signal line high.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2316 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes P2316?

open ground return of the ignition coil "F" primary control
failed ignition coil "F" primary control pulling the signal high
signal wire shorted to battery positive
worn spark plugs or wrong plug gap
damaged coil wiring or connector
failed ignition coil or coil pack
moisture or oil in the spark plug wells
faulty ignition control circuit in the ECM

Common symptoms of P2316

loss of power and jerking
hard starting, especially in damp weather
Check Engine Light on
increased fuel consumption
misfires under load or at idle

How to diagnose P2316

Connect an OBD2 scanner, confirm P2316 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
Visually inspect the wiring harness and connectors related to the ignition system for damage, corrosion, chafing or poor contact.
With the ignition coil "F" primary control disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
Swap the coil to another cylinder and see if the fault code follows it.
Inspect spark plugs for wear, oil or carbon tracks and check plug gaps.
Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2316 does not return.

How to fix P2316

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

Replace an ignition coil — $150–$380
Replace spark plugs — $90–$250
Repair coil wiring or connector — $80–$250

How much does it cost to fix P2316?

Repair cost depends on which component actually failed. Typical scenarios for P2316 (parts and labor, USD, independent shop rates):

Replace an ignition coil: $150–$380
Replace spark plugs: $90–$250
Repair coil wiring or connector: $80–$250

Overall, fixing P2316 usually costs between $80 and $380. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2316?