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DTC codes / Volkswagen codes / P1119

P1119 · VolkswagenOxygen Sensor Heater Circuit Bank 2 Sensor 1 Short To Ground

P1119 on Volkswagen vehicles means the engine control module (ECM) has detected a short to ground in the heater circuit for the pre-catalytic oxygen sensor on bank 2, sensor 1. The ECM monitors the heater element's current draw and flags this code when the circuit is grounded before the heater element, preventing the sensor from reaching operating temperature quickly.

SystemPowertrain
Code typeVolkswagen specific
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering

Symptoms you may notice

  • Illuminated check engine light, often with no other noticeable symptoms
  • Slightly higher fuel consumption during cold starts because the sensor stays in open-loop longer
  • Occasional rough idle or hesitation when the engine is cold
  • Failed emissions test due to incomplete oxygen sensor monitor
  • In rare cases, a blown fuse for the oxygen sensor heater circuit

Common causes, most likely first

  1. Chafed or damaged heater circuit wiring shorting to the engine block or chassis
  2. Failed oxygen sensor heater element internally shorted to ground
  3. Corroded or water-intruded connector at the bank 2 sensor 1 oxygen sensor
  4. Pinched harness between the sensor and the ECM caused by previous repairs
  5. Faulty ECM driver for the heater circuit (rare but possible)

How to diagnose and fix it

  1. Scan all modules for stored codes and freeze-frame data to confirm P1119 is active and not a ghost code
  2. Inspect the bank 2 sensor 1 oxygen sensor connector and harness for chafing, corrosion, or moisture intrusion
  3. Measure resistance between the heater circuit terminals at the sensor and ground to check for an internal short
  4. Disconnect the ECM and check for continuity to ground on the heater control wire to isolate a harness short
  5. Check the oxygen sensor heater fuse and replace it if blown, then recheck for shorts before installing a new sensor
  6. Replace the bank 2 sensor 1 oxygen sensor if the heater element is shorted internally
  7. Clear codes and perform a road test to verify the heater circuit monitor completes without resetting the code

What a shorted heater circuit really means

  • A short to ground in the heater circuit often blows the oxygen sensor heater fuse, so always check the fuse before condemning the sensor itself.
  • Volkswagen's ECM strategy may disable the heater circuit entirely when a short is detected, so the sensor never reaches operating temperature and the engine stays in open-loop longer than normal.
  • The bank 2 sensor 1 designation refers to the sensor before the catalytic converter on the bank opposite cylinder one, which on VR6 and V6 engines is often the harder one to reach.
  • A chafed harness near the exhaust manifold or transmission bell housing is a common cause that gets missed when technicians replace the sensor without inspecting the wiring.
  • This code does not always mean the sensor is faulty; a shorted heater wire can mimic a failed sensor and lead to repeat replacements if the harness is not repaired.

Can I keep driving with P1119?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy loads and long trips because the engine may stay in open-loop and run rich, which can damage the catalytic converter over time. If the check engine light starts flashing, stop driving and have the vehicle towed.

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.

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