EPC light and engine codes: U0121 and 1316 - Volkswagen Jetta Forum
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Old 12-28-2019, 12:07 AM   #1
Junior Member
Join Date: Aug 2018
Posts: 3
Default EPC light and engine codes: U0121 and 1316

2012 Jetta 2.0L base model 4 door

So, the strangest thing happened yesterday. I was replacing a driverside taillight and replacing the wiper motor. The wiper motor was the later job. While I was replacing the wiper motor, which was more difficult than thought due to the fact I was in a hurry, the car’s EPC light came on and the car would not start. During the process of figuring out how the wiper motor is reinstalled and figuring out the alignment of the blades after installation I hear this clicking noise on the passenger side in the engine compartment. This noise worried me but it went away so ignored it but after that the car would not start. I later remembered that the battery was 3 years old so I jumped it off and it started right up. Now the along with the EPC light there were many other lights, abs, check engine. I drove to auto parts store about 4 miles and car drove fine no issues. The battery tested fine he said it technically is good but it’s at the end of its life and several trouble codes popped up when he scanned the car. He said there were only two with actually codes but they were all related. I’m thinking I might just replace the battery and see if anything changes. Anyone else have this issue or have any information?
Jessedavis82 is offline  
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