What Does P1363 Mean?
The ignition control circuit for cylinder 3 has detected a short circuit to ground. This prevents the ignition coil from receiving proper signal, causing cylinder 3 misfire.
Common Causes
40%
Shorted ignition coil primary winding to ground
30%
Damaged wiring harness with control wire grounded
18%
Failed coil driver in PCM or IDM shorted to ground
12%
Water or contamination in coil connector causing short
Diagnostic Steps
1
Step 1: Disconnect cylinder 3 ignition coil and verify code does not reset (isolate component)
2
Step 2: Test primary winding resistance of coil 3 (should be 0.5-2 ohms, not zero)
3
Step 3: Check for continuity to ground on control wire with coil disconnected
4
Step 4: Inspect wiring from PCM/IDM to coil 3 for physical damage or chafing
5
Step 5: Test coil control signal with lab scope during cranking if wiring passes
Estimated Repair Cost
$120 - $450
Parts + labor, varies by vehicle and location
The ignition control circuit for cylinder 3 has detected a short circuit to ground. This prevents the ignition coil from receiving proper signal, causing cylinder 3 misfire.
The most common cause of P1363 (Cyl. 3, ignition circuit Short Circuit to ground) is: Shorted ignition coil primary winding to ground
Typical repair costs for P1363 range from $120 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine runs rough with reduced power and poor fuel economy. Extended operation may damage catalytic converter.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1363 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Manufacturer
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