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2001 Volkswagen Jetta GL 2.0L Excessive Emissions, MIL Lamp on
Posted to European Driveability on 4/4/2005 9 Replies

we have had this vehicle in twice now for this problem. the first time sensor 1 was not switching. we replaced the front o2 sensor and all fuel trim values returned to normal and the o2 was switching properly. now the vehicle has returned with a p1128 as a cur...

9 Replies Received (View Replies)

  Related Documents & Media  2001 Volkswagen Jetta GL

 
Message Closed w/FIX

car Vehicle Data

2001 Volkswagen Jetta GL

VIN 3VWR529M61
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, MIL Lamp On
OccursIntermittently

Trouble Codes

P0134Air Fuel Sensor (Bank 1 Sensor 1) Heater System Malfunction
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0139Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response
P0172Fuel System Too Rich (Bank 1)
P1128MAP Sensor Signal Lower Than Expected
Message Closed w/FIX

car Vehicle Data

2001 Volkswagen Jetta GL

VIN 3VWR529M61
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, MIL Lamp On
OccursIntermittently

Trouble Codes

P0134Air Fuel Sensor (Bank 1 Sensor 1) Heater System Malfunction
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0139Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response
P0172Fuel System Too Rich (Bank 1)
P1128MAP Sensor Signal Lower Than Expected