DTC U140 Fiat
O2 (B1 S2) Slow Response
O2 (B1 S2) Slow Response
Description
Engine started; vehicle driven at 20-55 mph with the throttle open for 2 minutes, ECT Sensor more than 158ºF, Converter temperature over 1112ºF, EVAP purge on, and the PCM detected the O2 signal switched from rich-to-lean less than 11 times in 20 second
Cause and Solution
Exhaust leak present in the exhaust manifold or exhaust pipesO2 element is contaminated, deteriorated or it has failedO2 ground or O2 signal circuit has high resistance
Video Guide
Diagnostic Info
- DTC Code: U140
- Brand: Fiat