How is fault code P0612 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. Read all stored codes, not just the P0612. Power and ground codes like P0611, P0670 or P0251 sitting alongside it tell you a lot about which way to point the diagnosis 2. Find the injector control module relay, usually in the engine bay fuse and relay box, and pull it out. Look at the pins for burning, green corrosion or melting around the socket 3. With the ignition on, put a multimeter across the relay coil terminals. You're looking for roughly 12 volts at the trigger side. No voltage means the fault is upstream in the control circuit 4. Swap in a known-good relay of the same part number if you have one. A surprising number of P0612s clear right there for a couple of quid 5. Run the loom from relay to module by hand, checking for chafing, breaks and damp connectors. Wiggle-test the plugs with the meter connected to catch intermittent drops 6. Confirm voltage actually reaches the module connector when the relay clicks in. If the relay and wiring are good but the module sees nothing, yo

Fuel Injector Control Module Relay Control Circuit

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. Read all stored codes, not just the P0612. Power and ground codes like P0611, P0670 or P0251 sitting alongside it tell you a lot about which way to point the diagnosis 2. Find the injector control module relay, usually in the engine bay fuse and relay box, and pull it out.

PPowertrain
0Generic code
6Computer Output
12Sequence number

What does it mean?

P0612 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Fuel Injector Control Module Relay Control . 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.