What Does P1300 Mean?
The PCM has detected a malfunction in the igniter (ignition control module) circuit for Bank 1 or cylinder number 1. This prevents the ignition system from properly firing the spark plugs on the affected bank or cylinder.
Safety Warning
Engine will misfire severely or fail to start. Vehicle may stall unexpectedly during operation. Unburned fuel can damage catalytic converter if driven.
Common Causes
35%
Failed ignition coil or igniter module
25%
Open or shorted wiring in igniter control circuit
20%
Poor ground connection at igniter or coil
15%
Corroded or damaged igniter connector
5%
Failed PCM ignition driver circuit
Diagnostic Steps
1
Step 1: Inspect ignition coil and igniter module connectors for corrosion, damage, or loose connections
2
Step 2: Test ignition coil primary and secondary resistance according to specifications
3
Step 3: Check for power and ground at igniter module with key on
4
Step 4: Use oscilloscope to verify ignition trigger signal from PCM to igniter
5
Step 5: Test for spark at affected cylinder(s) using spark tester
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has detected a malfunction in the igniter (ignition control module) circuit for Bank 1 or cylinder number 1. This prevents the ignition system from properly firing the spark plugs on the affected bank or cylinder.
The most common cause of P1300 (Igniter Circuit Malfunction (Bank 1 Or No. 1)) is: Failed ignition coil or igniter module
Typical repair costs for P1300 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will misfire severely or fail to start. Vehicle may stall unexpectedly during operation. Unburned fuel can damage catalytic converter if driven.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1300 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Manufacturer
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