LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2014 >> Beetle TDI, 2D Hatchback, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> 2.0L - Generic Scan Tool - Engine Code: CJAA (Hatchback) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Heated Oxygen Sensor -G39-, Checking >> Test Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Checking heater resistance

-- Disconnect the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19- electrical harness connector -1-.

Fig 1: Components Inside Particulate Filter (Engine Code CBEA)
GWWA23-10440Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Using a multimeter, measure the resistance of the heater from terminal 3 to terminal 4 of the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19- connector.

Specified value: 2 - 4 Ω with the exhaust system at room temperature

If the specified value was Not obtained:

-- Replace the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19-. Refer to the Repair Information.

If the specified value was obtained:

-- Switch ignition on.

-- Using a multimeter, measure the voltage from terminal 4 of the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19- harness connector to ground.

Specification: About Battery voltage

-- Switch ignition off.

If specified value is Not obtained:

-- Check for an open, short to ground or high resistance between terminal 4 of the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19- and the Heated Oxygen Sensor (HO2S) Fuse, (Refer to applicable wiring diagram for fuse positions).

-- If necessary, repair the wiring connection.

If the specified value was obtained:

-- Connect scan tool.

-- Start the engine and let idle.

-- Perform the function test located in diagnostic mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If specified values are obtained:

-- Fault may be intermittent.

-- Check for loose or corroded connections and any leaks in the exhaust.

-- Check Freeze Frame data for conditions when the DTC set.

-- Go to FINAL PROCEDURES 

If the specified values are not obtained:

-- Using a Multimeter, Check the Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19- electrical harness connector terminals 2 to 6 for voltage.

Specified value: 0.40 to 2.00 Volts approx.

-- Switch the ignition Off.

If the specified value was obtained:

-- Replace Heated Oxygen Sensor (HO2S) -G39- / Oxygen Sensor Heater -Z19-. Refer to Repair Information.

If the specified value was not obtained:

scientia non olet · About LEMON Manuals