Glow Plug Monitor Fault Bank #1
The P1395 code indicates that the powertrain control module (PCM) has detected a malfunction in the glow plug monitoring circuit for cylinder bank #1. This typically occurs when one or more glow plugs fail to reach the required resistance or current draw during the pre-glow cycle, often due to worn-out glow plugs, faulty glow plug relay, or wiring issues. In diesel engines, this can lead to hard starting, especially in cold weather.
01. Most Common Causes
- Failed glow plug(s) in bank #1
- Faulty glow plug relay or control module
- Open or shorted wiring in glow plug circuit
- Corroded connectors or poor ground
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Hard starting, especially in cold weather
- Rough idle or misfire on cold start
- Excessive white smoke 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 #1 (spec: 0.5-2.0 ohms).
Step 4: Test glow plug relay and control circuit voltage with a multimeter.
Step 5: Replace faulty glow plug(s) or relay as needed and clear code.
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 starting may become difficult, especially in cold conditions. Prolonged driving may cause excessive smoke and potential damage to other components.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the number of glow plugs replaced and labor rates.