Cylinder 2 Glow Plug Circuit Failure
Glow plug for cylinder 2 is not operating properly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The glow plug in cylinder 2 isn't heating up like it should when you start your diesel engine. Instead of getting the right heat, it might be stuck off, which can make starting hard in cold weather.
What the computer is actually seeing
The engine control module (ECM) monitors the resistance in the glow plug circuit for cylinder 2. If the resistance is outside of the normal range (usually greater than 5 ohms or open circuit), a fault is detected, triggering the code.
What a healthy reading looks like
Typically, a good glow plug should measure around 0.5 to 1.5 ohms of resistance. Check this with a multimeter.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the glow plug fuse; replace if blown and retest.
- 2Using a multimeter, measure the resistance of the glow plug in cylinder 2. If above 1.5 ohms, replace the glow plug.
- 3Inspect the wiring and connectors leading to the glow plug for damage or corrosion; repair or replace as necessary.
- 4Check the glow plug relay to ensure it's functioning; swap with a known good one if available.
Common causes
- Faulty glow plug
- Corroded connectors or wiring
- Blown fuse for glow plug relay
- Faulty glow plug relay
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but may have hard starting issues in cold temperatures; consider repairing soon.
Will this code come back after reset?
If the underlying issue isn't fixed, yes, it will return.
Why does this pair with other glow plug codes?
Because if one glow plug fails, others might follow due to similar wiring or relay concerns.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →