How is fault code P0382 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Pull the glow plug terminal caps off and test each plug on the 'B' circuit for resistance with a multimeter. A healthy plug reads very low, usually well under 1 ohm. Anything open or sky-high is dead 2. Have a proper look at the wiring and the spade connectors on top of the plugs for corrosion, melting, or a cap that's worked loose. This is where a lot of these faults actually live 3. Check the glow plug fuse and relay, swap the relay for a known-good one if you can to rule it out cheaply 4. On engines with a glow plug control module, scan it for its own codes and check the feedback voltages it's reporting back to the ECM 5. Note any other stored codes at the same time. A spread of glow plug faults pointing at multiple cylinders usually means the module or wiring rather than a single dead plug 6. Clear the codes after the repair and do a cold start the next morning to confirm it stays gone

Glow Plug/Heater Indicator Circuit Malfunction

Jump to the fix

Severity

High

Can I keep driving?

Avoid extended driving; visit a service soon.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Pull the glow plug terminal caps off and test each plug on the 'B' circuit for resistance with a multimeter. A healthy plug reads very low, usually well under 1 ohm. Anything open or sky-high is dead 2.

PPowertrain
0Generic code
3Ignition / Misfire
82Sequence number

What does it mean?

P0382 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Glow Plug/Heater Circuit "B" . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.