2003 GTI/VR6 O2 sensor no activity
#1
06-23-2019, 02:16 PM
2003 GTI/VR6 O2 sensor no activity
Something caught the wire to the O2 sensor in Bank 1 Sensor 2 and the wires were shredded and broke. I was receiving codes for both sensors so I replaced them both. Sensor 1 is working but sensor 2 is not. I am getting code P1198(O2 sensor bank 1 sensor 2 electrical malfunction) and P0140(O2 sensor bank 1 sensor 2 no activity detected). The plugs were still securely seated in the box so I do not think there is any issue with the plugs or corresponding wiring. I checked the plugs and all of the wires are tight. My son was driving the car for some time and by the time I received it back it was not running. I scanned the car and the MAF sensor and both O2 sensors were bad. I replaced the MAF sensor as well as the O2 sensors. The car is running but definitely does not have the acceleration it usually does. Any help would be appreciated.
Update: I thought it possible but unlikely that the new sensor could be bad. My supplier warranted the sensor and I installed another new one but am getting the same results.
Update: I thought it possible but unlikely that the new sensor could be bad. My supplier warranted the sensor and I installed another new one but am getting the same results.
#2
06-24-2019, 08:20 AM
Welcome to the forum. 
After being prompted.
Those error codes are different from your other post.
VAG Error Code: 16524/000320/4025
After being prompted.
Those error codes are different from your other post.
VAG Error Code: 17606
EOBD II Error Code: P1198
Fault Location:
Oxygen (Lambda) Sensor 2 (G130), Bank 1 Heater Circuit - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Failed Oxygen (Lambda) Sensor 2 (G130) heater circuit.
Wiring Harness issue.
Oxygen (Lambda) Sensor 2 (G130).
Failing Engine Control Module (ECM).
Possible Solutions:
Inspect and test Oxygen (Lambda) Sensor heater circuit as per repair manual.
Inspect and test wiring harness as per wiring diagram.
Replace Engine Control Module (ECM) if Oxygen (Lambda) Sensor and wiring harness are to factory design.
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Oxygen (Lambda) Sensor 2 (G130), Bank 1.
Special Notes:
On V6 engines, B1S2 and B2S2 may share a common ground though the Engine Control Module (ECM), see wiring diagram.
Fault Location:
Oxygen (Lambda) Sensor 2 (G130), Bank 1 Heater Circuit - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Failed Oxygen (Lambda) Sensor 2 (G130) heater circuit.
Wiring Harness issue.
Oxygen (Lambda) Sensor 2 (G130).
Failing Engine Control Module (ECM).
Possible Solutions:
Inspect and test Oxygen (Lambda) Sensor heater circuit as per repair manual.
Inspect and test wiring harness as per wiring diagram.
Replace Engine Control Module (ECM) if Oxygen (Lambda) Sensor and wiring harness are to factory design.
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Oxygen (Lambda) Sensor 2 (G130), Bank 1.
Special Notes:
On V6 engines, B1S2 and B2S2 may share a common ground though the Engine Control Module (ECM), see wiring diagram.
VAG Error Code: 16524/000320/4025
EOBD II Error Code: P0140
Fault Location:
Oxygen (Lambda) Sensor 2 (G130), Bank 1 - No Activity
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
High Fuel Consumption.
Excessive Smoke from Exhaust.
Wiring/Connector(s).
Oxygen (Lambda) Sensor 2 (G130).
Inappropriate fuel pressure.
Faulty fuel injectors.
Intake air leaks may be faulty.
Exhaust gas leaks.
Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Oxygen (Lambda) Sensor 2 (G130), Bank 1.
Follow up with Readiness Screen Testing.
Signal voltage 0.40 - 0.60 V for > 3 Sec.
Sensor voltage load pulse vs. no pulse = 2.80 V.
Internal resistance > 40 K Ohms.
Exhaust temperature > 600°C.
Tech Notes:
Replacing the Rear Heated Oxygen Sensor (HO2S) Bank 1 usually takes care of the problem.
When is the code detected?:
The P0140 code is set when the voltage signal sent from the sensor to the Engine Control Module (ECM) is constant.
Description:
The Oxygen (Lambda) Sensor 2 (G130), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The Oxygen (Lambda) Sensor 2 (G130) output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The Oxygen (Lambda) Sensor 2 (G130) generates a voltage between 0.1 and 0.9V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The Engine Control Module (ECM) interprets Lean when the Oxygen (Lambda) Sensor 2 (G130) voltage is below 0.45V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The Engine Control Module (ECM) interprets Rich when the Oxygen (Lambda) Sensor 2 (G130) voltage is above 0.45V.
As taken from my new EOBD II Fault Codes Software
Last edited by Keithuk; 09-23-2019 at 08:43 AM.
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