Faulty fuel injector on cylinder 7 (open or shorted coil); Damaged or corroded electrical connector at the injector; Chafed, broken, or shorted wire in the injector harness; Loose or corroded ground connection for the injector circuit; Failed engine control module (ECM) driver for that injector (rare); Aftermarket or damaged injector with incorrect resistance; Intrusion of water or oil into the injector harness connector

DTC codes / Volkswagen codes / P1207

P1207 · VolkswagenCylinder 7 Fuel Injector Circuit Electrical Malfunction

Q: What does code P1207 mean?

Cylinder 7 Fuel Injector Circuit Electrical Malfunction. P1207 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an electrical fault in the circuit for the fuel injector on cylinder 7. This typically means the ECM sees an unexpected voltage or current condition, such as an open circuit, short to ground, or short to power, that prevents proper injector operation.

P1207 on Volkswagen vehicles indicates that the engine control module (ECM) has detected an electrical fault in the circuit for the fuel injector on cylinder 7. This typically means the ECM sees an unexpected voltage or current condition, such as an open circuit, short to ground, or short to power, that prevents proper injector operation.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
Rough idle or misfire, especially noticeable at idle or low speeds
Engine hesitation or stumbling during acceleration
Reduced engine performance and power output
Increased fuel consumption due to improper fuel delivery
Possible smell of raw fuel from the exhaust if the injector is stuck open

Common causes, most likely first

Faulty fuel injector on cylinder 7 (open or shorted coil)
Damaged or corroded electrical connector at the injector
Chafed, broken, or shorted wire in the injector harness
Loose or corroded ground connection for the injector circuit
Failed engine control module (ECM) driver for that injector (rare)
Aftermarket or damaged injector with incorrect resistance
Intrusion of water or oil into the injector harness connector

How to diagnose and fix it

Perform a visual inspection of the cylinder 7 injector connector and wiring for damage, corrosion, or loose pins
Measure the resistance of the injector with a multimeter and compare to specification (typically 10-15 ohms)
Check for battery voltage at the injector connector with the key on and engine off, and inspect the ground side for continuity
Use a noid light or oscilloscope to verify the injector pulse signal from the ECM
Test the injector circuit for shorts to ground or power using a multimeter and wiring diagram
If the circuit tests good, swap the injector with a known-good one from another cylinder to see if the misfire moves
Replace the faulty injector or repair the wiring as needed, then clear the code and verify the repair with a test drive

Don't overlook the injector harness

A common cause of P1207 is a chafed wire in the injector harness where it rubs against the engine cover or intake manifold, often hidden from plain view.
The code can be set by a poor connection at the injector connector even if the injector itself is good, so always check terminal tension and corrosion before replacing parts.
On some Volkswagen engines, the injector harness is part of the engine wiring harness and can be damaged by heat or oil leaks, leading to intermittent faults.
A failed ECM driver is rare but possible; however, misdiagnosis often leads to unnecessary ECM replacement when the real issue is a shorted injector or wiring.
P1207 may be accompanied by misfire codes for cylinder 7, but the absence of a misfire code does not rule out an injector circuit problem if the fault is intermittent.

Can I keep driving with P1207?

Driving with P1207 is possible but not recommended for extended periods, as a faulty injector can cause misfires that may damage the catalytic converter or lead to poor fuel economy. Avoid heavy acceleration and have the vehicle diagnosed promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

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