What Does P1310 Mean?
P1310 indicates a malfunction in the igniter circuit for cylinder number 3. The igniter module controls the primary current switching for the ignition coil, and the ECM has detected an abnormal feedback signal from the No. 3 igniter. This will cause a persistent misfire on cylinder 3 and likely trigger the check engine light to flash.
Common Causes
35%
Failed igniter (power transistor) for cylinder 3
30%
Defective ignition coil on cylinder 3
20%
Damaged wiring or connector between ECM and igniter
10%
Poor ground at the igniter module
5%
ECM igniter driver failure
Diagnostic Steps
1
Inspect the igniter module and cylinder 3 coil connector for heat damage, corrosion, or loose pins.
2
Swap the cylinder 3 ignition coil with a known-good coil from another cylinder and clear codes to see if the fault follows the coil.
3
Measure the primary and secondary resistance of the cylinder 3 ignition coil against specifications.
4
Check for proper power supply and ground at the igniter module connector.
5
Use an oscilloscope to verify the ECM trigger signal waveform on the cylinder 3 igniter input.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
P1310 indicates a malfunction in the igniter circuit for cylinder number 3. The igniter module controls the primary current switching for the ignition coil, and the ECM has detected an abnormal feedback signal from the No. 3 igniter. This will cause a persistent misfire on cylinder 3 and likely trig...
The most common cause of P1310 (Igniter Circuit Malfunction (No. 3)) is: Failed igniter (power transistor) for cylinder 3
Typical repair costs for P1310 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A cylinder 3 misfire causes rough running, loss of power, and sends unburned fuel to the catalytic converter, which can overheat and pose a fire risk. Avoid sustained driving with a steady misfire.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1310 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
