How is fault code P064C 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 codes and the freeze frame, then check whether anything else is logged. A module fault sitting alongside individual glow plug codes points you straight at the plugs or wiring rather than the module 2. Get under the bonnet and eyeball the module connector and the loom running to the plugs. Look for green corrosion, melted insulation, or a connector that's worked loose with vibration 3. Confirm you've got a healthy battery and a clean earth. Glow systems pull serious current, so a tired battery or corroded earth point throws these codes all on its own 4. Check the supply fuse and the glow relay, swapping the relay for a known-good one if you can 5. Resistance-test the glow plugs individually with a multimeter, you're looking for somewhere around 0.5 to 2 ohms each depending on type. Anything reading open is dead 6. If plugs, wiring, fuses and supply all check out, the module is the prime suspect at that point

Glow Plug Control Module 1

Jump to the fix

Severity

Medium

Can I keep driving?

Usually drivable, but get it diagnosed without delay.

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 codes and the freeze frame, then check whether anything else is logged. A module fault sitting alongside individual glow plug codes points you straight at the plugs or wiring rather than the module 2. Get under the bonnet and eyeball the module connector and the loom running to the plugs.

PPowertrain
0Generic code
6Computer Output
4CSequence number

What does it mean?

P064C is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Glow Plug Control Module . 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.