Q: 93 Ford escort has a 172 DTC, what could cause this? on 1993 Ford Escort

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
HEGO (too lean)
(1) Answer
(1) Comments
PCV Valve operates as it should.....Just checked to be sure. thanks for your response.

Just got back from smog check. I replaced the O2 sensor and cleared the codes. It passed with flying colors, with no Check engine lite.

thanks for the help!