Volkswagen error code P1570 indicates “Engine Control Module (ECM) Disabled” or “Engine Start Blocked by Immobilizer.”
In short: Your car’s anti-theft system thinks the car is being stolen and is cutting off the fuel or spark to stop the engine.
Common Symptoms
Start then Stall: The engine fires up normally but shuts off immediately (usually after 1–2 seconds).
Immobilizer Light: A warning light (usually a yellow car with a key inside) flashes on the dashboard.
No Start: In some cases, the engine will crank but never actually catch.
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Troubleshooting Steps (Try these first)
1. Try a Spare Key
The most common cause is a bad transponder chip inside your key.
Test: Switch to your spare key.
Result: If the spare key works, your primary key is defective or has lost its coding. You will need a locksmith or dealer to reprogram it.
2. The “Hard Reset” (Capacitor Discharge)
Electronic glitches often trigger this code. This reset clears the memory of the modules.
Disconnect both battery cables (positive and negative) from the battery terminals.
Touch the cable ends together (do not touch them to the battery!) for about 15–30 seconds. This drains residual power from the ECU.
Reconnect the cables and try to start the car.
3. Check Battery Voltage
If your car battery is weak, the voltage may drop too low during startup, causing the immobilizer to fail the security check.
Test: If the battery is old, try jump-starting the car. If the error disappears while connected to jumper cables, you likely just need a new battery.
4. Check for Interference
Do you have other car keys, RFID tags, or large metal objects on the same keychain? These can block the signal between your key and the ignition. Remove them and try again.
Next Steps
If none of the above works, the issue is likely a hardware failure, such as the pickup coil (the antenna ring around the ignition switch) or the instrument cluster. You will likely need a shop with VAG-COM (VCDS) software to diagnose the specific communication failure.
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