What is the diagnostic code 1152 on a VW 2001 Jetta mean?

Diagnostic code 1152 on a VW 2001 Jetta stands for "O2 Sensor 1 Heater Circuit Malfunction". It indicates that there's a problem with the oxygen sensor 1 (located in the front exhaust pipe) and its associated heating circuit.

Possible causes for this code include:

- Faulty oxygen sensor 1

- Faulty or damaged wiring or connectors

- Faulty heating element within the oxygen sensor

- Malfunctioning engine control module (ECM)

Additional symptoms that may be associated with this code include:

- Check Engine Light illuminated on the dashboard

- Reduced fuel efficiency

- Rough or unstable engine idle

- Poor acceleration

- Engine may run rich (excess fuel)

If you're experiencing diagnostic code 1152 on your VW 2001 Jetta, it's essential to address the issue as soon as possible to avoid potential damage to the catalytic converter and other engine components. It's recommended to have your vehicle inspected by a qualified automotive technician or VW service center for proper diagnosis and repair.