What Does P1382 Mean?
This code combines a crankshaft position sensor issue with early activation of the cylinder 4 ignition coil. The CKP sensor problem is likely causing incorrect timing signals leading to premature coil firing.
Safety Warning
CKP sensor faults can cause stalling, no-start conditions, or sudden loss of power while driving. Repair immediately to avoid being stranded.
Common Causes
40%
Faulty crankshaft position sensor providing erratic timing signals
25%
Damaged reluctor ring or flexplate affecting CKP sensor readings
15%
Defective ignition coil cylinder 4 with timing control fault
12%
Poor connection or damaged wiring at CKP sensor
8%
ECM timing control circuit malfunction
Diagnostic Steps
1
Step 1: Inspect crankshaft position sensor and connector for damage, debris, or excessive air gap
2
Step 2: Use oscilloscope to monitor CKP sensor waveform for consistency and proper signal amplitude
3
Step 3: Check reluctor ring or tone wheel for missing teeth, damage, or excessive runout
4
Step 4: Monitor cylinder 4 ignition coil trigger timing relative to CKP sensor signal
5
Step 5: Test ECM reference voltage supply to CKP sensor and verify ground circuit integrity
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
This code combines a crankshaft position sensor issue with early activation of the cylinder 4 ignition coil. The CKP sensor problem is likely causing incorrect timing signals leading to premature coil firing.
The most common cause of P1382 (Crankshaft Position (CKP)/Ignition Coil - Cylinder 4 - Early Activation Fault) is: Faulty crankshaft position sensor providing erratic timing signals
Typical repair costs for P1382 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
CKP sensor faults can cause stalling, no-start conditions, or sudden loss of power while driving. Repair immediately to avoid being stranded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1382 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System / Engine Position Sensing
Difficulty
Type
Manufacturer
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