What Does P1395 Mean?
The engine control module has detected an electrical malfunction in the power output stage controlling ignition coil #3. This fault indicates problems with the ECM's ability to properly drive the primary ignition circuit for this coil.
Common Causes
40%
Defective ignition coil #3 with internal short or open
25%
Damaged wiring harness or connector to ignition coil #3
15%
Failed ECM driver transistor for coil #3 output stage
12%
Corroded or backed-out connector pins at coil or ECM
8%
Fouled or damaged spark plug causing coil overload
Diagnostic Steps
1
Step 1: Test for spark at cylinder #3 using inline spark tester
2
Step 2: Check primary and secondary coil resistance using digital multimeter
3
Step 3: Inspect coil connector and wiring for signs of heat damage, melting, or corrosion
4
Step 4: Verify ECM trigger signal quality and voltage using oscilloscope
5
Step 5: Perform coil swap test by exchanging coil #3 with adjacent cylinder coil
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
The engine control module has detected an electrical malfunction in the power output stage controlling ignition coil #3. This fault indicates problems with the ECM's ability to properly drive the primary ignition circuit for this coil.
The most common cause of P1395 (Ignition Coil Power Output Stage 3 Electrical Malfunction) is: Defective ignition coil #3 with internal short or open
Typical repair costs for P1395 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will misfire on cylinder #3 causing rough operation and reduced power. Can be driven short distances but prolonged use may damage catalytic converter and oxygen sensors.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1395 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Manufacturer
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