2002 GTI 1.8t golf need help
#1
01-09-2014 | 05:40 PM
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Junior Member
Joined: Jan 2014
Posts: 2
2002 GTI 1.8t golf need help
A couple days ago my EPC light came on and i lost all power to the accelerator, pulled over turned off the car waited for a bit and turned it back on and it drove normal again. There also was one time where i turned it off and back on and it started revving itself up high. Usually when the car has been sitting for awhile it goes back to normal driving after the EPC issue happens.
I scanned my car with a Obd2 reader and got these codes.
P1861 - ? Scanner never gave a definition
P2128 - Throttle/Pedal Position Sensor/Switch "E" Circuit High Input
P2123 - Throttle/Pedal Position Sensor/Switch "D" Circuit High Input
P0138 - O2 Circuit High Voltage (Bank 1, Sensor 2) - Just changed both O2 sensors yesterday and cleared CEL. Not sure why this is still popping up.
Any help is appreciated.
I scanned my car with a Obd2 reader and got these codes.
P1861 - ? Scanner never gave a definition
P2128 - Throttle/Pedal Position Sensor/Switch "E" Circuit High Input
P2123 - Throttle/Pedal Position Sensor/Switch "D" Circuit High Input
P0138 - O2 Circuit High Voltage (Bank 1, Sensor 2) - Just changed both O2 sensors yesterday and cleared CEL. Not sure why this is still popping up.
Any help is appreciated.
#2
01-09-2014 | 07:13 PM
Super Moderator
Joined: Sep 2009
Posts: 2,648
From: Stoke on Trent, England
Welcome to the forum. 
As taken from my https://volkswagenforum.com/forum/ge...oftware-34973/
https://volkswagenforum.com/forum/ne...gnature-34185/
EOBD II Error Code: P1861
Fault Location:
Engine Control Module (ECM), Throttle Control System - Signal Malfunction
Possible Cause:
Wiring/Connector(s).
Accelerator pedal position (APP) sensor.
Throttle position sensor (TPS) (G127).
VAG Error Code: 18560
EOBD II Error Code: P2128
Fault Location:
Throttle Position Sensor (TPS) (G127)/Switch 'E'/Accelerator Pedal Position (APP) Sensor/Switch 'E' - High Input/Short Circuit to Positive
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Reduced Power Output.
Faulty Accelerator Pedal (very unlikely).
Wiring Harness Issue.
Faulty Engine Control Module (ECM).
O2 Sensor(s).
Possible Solutions:
Inspect and test Wiring harness for Accelerator Pedal, see Repair Manual.
Visually inspect O2 sensors for damage.
Special Notes:
O2 sensor issues can also cause the following Diagnostic Trouble Codes (DTC)s:
16610/P0226 - Throttle Pedal Position Sensor (G79): Implausible Signal.
18565/P2133 - Throttle Position Sensor Bank 2: Signal too High.
In some cases, O2 sensors will damage the Engine Control Module (ECM). Ross Tech suggest to replace O2 sensors before replacing an Engine Control Module (ECM) for this type of issue.
EOBD II Error Code: P2123
Fault Location:
Throttle Position Sensor (TPS) (G127)/Switch 'D'/Accelerator Pedal Position (APP) Sensor/Switch 'D' - High Input/Short Circuit to Positive
Possible Cause:
Wiring/Connector(s) short to positive.
Throttle position sensor (TPS) (G127).
Accelerator pedal position (APP) sensor/switch.
Possible Solutions:
Read Measuring Value Blocks (MVB).
VAG Error Code: 16522
EOBD II Error Code: P0138
Fault Location:
Oxygen (Lambda) Sensor (O2S) 2, Bank 1/Heated Oxygen Sensor (HO2S) 2 (G130), Bank 1 - High Voltage
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
High Fuel Consumption.
Excessive Smoke from Exhaust.
Wiring/Connector(s) short to positive.
Heated Oxygen Sensor (HO2S) 2 (G130).
Description:
The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), 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 HO2S 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 HO2S 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 HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The Engine Control Module (ECM) interprets Rich when the HO2S voltage is above 0.45V.
Fault Location:
Engine Control Module (ECM), Throttle Control System - Signal Malfunction
Possible Cause:
Wiring/Connector(s).
Accelerator pedal position (APP) sensor.
Throttle position sensor (TPS) (G127).
VAG Error Code: 18560
EOBD II Error Code: P2128
Fault Location:
Throttle Position Sensor (TPS) (G127)/Switch 'E'/Accelerator Pedal Position (APP) Sensor/Switch 'E' - High Input/Short Circuit to Positive
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Reduced Power Output.
Faulty Accelerator Pedal (very unlikely).
Wiring Harness Issue.
Faulty Engine Control Module (ECM).
O2 Sensor(s).
Possible Solutions:
Inspect and test Wiring harness for Accelerator Pedal, see Repair Manual.
Visually inspect O2 sensors for damage.
Special Notes:
O2 sensor issues can also cause the following Diagnostic Trouble Codes (DTC)s:
16610/P0226 - Throttle Pedal Position Sensor (G79): Implausible Signal.
18565/P2133 - Throttle Position Sensor Bank 2: Signal too High.
In some cases, O2 sensors will damage the Engine Control Module (ECM). Ross Tech suggest to replace O2 sensors before replacing an Engine Control Module (ECM) for this type of issue.
EOBD II Error Code: P2123
Fault Location:
Throttle Position Sensor (TPS) (G127)/Switch 'D'/Accelerator Pedal Position (APP) Sensor/Switch 'D' - High Input/Short Circuit to Positive
Possible Cause:
Wiring/Connector(s) short to positive.
Throttle position sensor (TPS) (G127).
Accelerator pedal position (APP) sensor/switch.
Possible Solutions:
Read Measuring Value Blocks (MVB).
VAG Error Code: 16522
EOBD II Error Code: P0138
Fault Location:
Oxygen (Lambda) Sensor (O2S) 2, Bank 1/Heated Oxygen Sensor (HO2S) 2 (G130), Bank 1 - High Voltage
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
High Fuel Consumption.
Excessive Smoke from Exhaust.
Wiring/Connector(s) short to positive.
Heated Oxygen Sensor (HO2S) 2 (G130).
Description:
The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), 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 HO2S 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 HO2S 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 HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The Engine Control Module (ECM) interprets Rich when the HO2S voltage is above 0.45V.
As taken from my https://volkswagenforum.com/forum/ge...oftware-34973/
https://volkswagenforum.com/forum/ne...gnature-34185/
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