Faulty fuel injector on cylinder 5 (open or shorted coil); Damaged or corroded wiring harness connector at the injector; Broken or chafed wire in the injector circuit between the ECM and injector; Failed engine control module (ECM) driver for that injector; Poor electrical connection at the ECM connector; Aftermarket or damaged injector with incorrect resistance

DTC codes / Volkswagen codes / P1205

P1205 · VolkswagenCylinder 5 Fuel Injector Circuit Electrical Malfunction

Q: What does code P1205 mean?

Cylinder 5 Fuel Injector Circuit Electrical Malfunction. P1205 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an electrical fault in the fuel injector circuit for cylinder 5. This means the ECM is not seeing the expected current flow or voltage pattern when it commands the injector to fire, which can prevent that cylinder from receiving fuel.

P1205 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an electrical fault in the fuel injector circuit for cylinder 5. This means the ECM is not seeing the expected current flow or voltage pattern when it commands the injector to fire, which can prevent that cylinder from receiving fuel.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Symptoms you may notice

Check engine light illuminated, often with no other noticeable symptoms
Rough idle or misfire, especially noticeable at idle or low speeds
Loss of power or hesitation during acceleration
Increased fuel consumption due to incomplete combustion
Engine may run rough or stumble under load
In some cases, the engine may enter limp mode to protect the catalytic converter

Common causes, most likely first

Faulty fuel injector on cylinder 5 (open or shorted coil)
Damaged or corroded wiring harness connector at the injector
Broken or chafed wire in the injector circuit between the ECM and injector
Failed engine control module (ECM) driver for that injector
Poor electrical connection at the ECM connector
Aftermarket or damaged injector with incorrect resistance

How to diagnose and fix it

Scan all modules for fault codes and record freeze-frame data to confirm the fault is current
Perform a visual inspection of the cylinder 5 injector connector and wiring for damage or corrosion
Measure the resistance of the cylinder 5 injector and compare to the manufacturer's specification
Check the injector circuit for shorts to ground or power and for open circuits using a multimeter
Test the injector driver signal from the ECM with an oscilloscope or noid light
If the circuit and injector test good, suspect the ECM and perform further diagnostics before replacement
Replace the faulty injector or repair the wiring as needed, then clear codes and verify the repair

Don't overlook the injector connector

A loose or corroded connector at the injector is a common cause that can mimic a failed injector, so always inspect and clean the terminals before condemning the part.
The code can be set by a momentary electrical glitch that does not affect driveability, so intermittent faults may require wiggle-testing the harness while monitoring live data.
On some Volkswagen engines, the injector wiring harness is routed near hot components and can suffer heat damage, leading to intermittent shorts.
A failed ECM driver is rare but possible; always rule out wiring and injector faults before replacing the ECM.
This code is specific to cylinder 5, so if misfire codes for other cylinders are present, look for a common cause such as fuel pressure or ignition issues.

Can I keep driving with P1205?

Driving with P1205 is possible but not recommended because the misfire can damage the catalytic converter and reduce engine performance. Avoid heavy acceleration and prolonged driving until the fault is repaired.

Tools that help

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Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.