Cylinder 5 Glow Plug Circuit Range/Performance
The P06BD code indicates that the powertrain control module (PCM) has detected a malfunction in the glow plug circuit for cylinder 5. This typically means the glow plug resistance is out of the expected range, or the circuit has an open or short. Glow plugs are essential for cold starts in diesel engines, and a fault can cause hard starting, misfires, and increased emissions.
01. Most Common Causes
- Faulty glow plug in cylinder 5
- Open or short in the glow plug wiring or connector
- Failed glow plug relay or fuse
- PCM issue (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Hard starting, especially in cold weather
- Rough idle or misfire on cylinder 5
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect glow plug wiring and connector at cylinder 5 for damage or corrosion.
Step 3: Measure resistance of glow plug 5; compare to spec (typically 0.5-2 ohms).
Step 4: Check glow plug relay and fuse operation.
Step 5: If wiring and relay are good, replace glow plug 5.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances, especially in cold weather, as it can cause hard starting, misfires, and potential damage to the engine or catalytic converter. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for a single glow plug replacement, including parts and labor. Costs may vary if wiring or relay repairs are needed.