What do you do when your customer’s vehicle is acting erratically? SureTrack community member dsauto951 had a Volkswagen Jetta in their shop that was not running consistently and had fuel system codes P1141 and P1152. They posed the question to the community, and with the help of fellow community member runtherack and others, they were able to resolve the issue.
The following Real Fix summarizes the interaction between them in the community that led to the solution.
Vehicle
2003 Volkswagen Jetta GL 2.0L
Title
Vehicle acting erratically, replaced MAF sensor
Complaint
Customer states that the car is acting erratically
Diagnostic Steps Performed/Parts Replaced
Replaced engine speed sensor and coolant bypass connector. Scanned vehicle for DTC. Codes P1141-Load detection implausible value, and P1152-long term fuel trim additive air, bank 1, range 2, system to lean. I have looked at sure track and found that the mass air flow is related between these two codes. Any tips or advice if this can be the probable cause? I am going to look into air leaks in the system check oxygen sensors. Thanks
Best Answer from Community Member runtherack
It is common to find an incorrect MAF sensor in a 2.0 L engine as there are several different part numbers which are visually identical but due to the different engine calibrations perform differently. The AEG engine MAF part number should end in a “461A” and engine AZG and AVH should end in “461G”.
Cause
Bad MAF sensor
Correction
Replaced MAF sensor, vehicle operating as expected.
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