2000 Porsche Boxster (986) F6-2.7L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 87

Display: less then 20 k ohms

3 Check oxygen sensor heating.

1. Remove oxygen sensor connector 1 ahead of TWC.

2. Connect ohmmeter to pins 1 and 2 of the oxygen sensor connector towards the oxygen sensor.

Display: 1.0 - 2.6 ohms at 25 锟斤拷C.

3. Connect ohmmeter to pin 1 of the oxygen sensor connector towards the oxygen sensor and the oxygen sensor housing.

Display: infinity ohms

4. Connect ohmmeter to pin 2 of the oxygen sensor connector towards the oxygen sensor and the oxygen sensor housing.

Display: infinity ohms

02 Sensor Circuit No Activity Detected

P0134

02 Sensor Circuit No Activity Detected

NOTE: The diagnosis for this fault is different, for models with turbo engines and models with naturally-aspirated engines.

Diagnosis/troubleshooting - all turbo models

NOTE: The DTC here covers the coupling of oxygen sensor heating into the sensor signal.

Diagnostic conditions

- Vehicle at operating temperature, then 3 minutes idle speed followed by 30 seconds increased idle speed

Possible cause of fault

- Short circuit in oxygen sensor wiring

- Oxygen sensor faulty (heater coupling or heating)

- DME control module faulty

Affected terminals

DME control module connector II, pin 9 and oxygen sensor connector after catalytic converter, bank 1, pin 5

DME control module connector II, pin 15 and oxygen sensor connector after catalytic converter, bank 1, pin 1

Diagnosis/troubleshooting - all turbo models

NOTE: Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (contamination of the

oxygen sensor via the reference air channel).