Glow Plug Monitor Fault Bank #2
The P1396 code indicates a fault in the glow plug monitoring circuit for cylinder bank #2. This system ensures proper glow plug operation for cold starts. The fault may be due to a failed glow plug, open or shorted wiring, or a faulty glow plug control module. Bank #2 typically refers to the cylinder bank opposite bank #1 on V6/V8 engines.
01. Most Common Causes
- Failed glow plug(s) in bank #2
- Open or shorted glow plug wiring harness
- Faulty glow plug control module or relay
- Corrosion or poor electrical connections
02. Symptoms You Will Notice
- Hard starting in cold weather
- Check Engine Light illuminated
- Rough idle or misfire on cold start
- Excessive white smoke from exhaust on startup
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect glow plugs and wiring for damage or corrosion.
Step 3: Measure resistance of each glow plug in bank #2 (spec ~0.5-2 ohms).
Step 4: Test glow plug control module output and relay operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances in mild weather, but cold starts will be difficult and may cause excessive smoke. Prolonged driving may lead to unburned fuel damaging the catalytic converter.
How much does it cost to fix?▼
Replacing a single glow plug costs $50-$150 including labor. If multiple plugs or the control module need replacement, costs can range from $200-$500.