DTC P0143 Cadillac
HO2S-13 (Bank 1 Sensor 3) Circuit Low Input
HO2S-13 (Bank 1 Sensor 3) Circuit Low Input
Description
DTC P0101-P0103, P0107, P0108, P0118, P0121, P0122, P0123, P0131-P0134, P0151-P0154, P0300, P1133, P1134, P1153 and P1154 not set, engine started, ECT sensor more than 167ºF, engine speed over 800 rpm, HO2S-13 signal varying while in closed loop, TP angle
Cause and Solution
Air leaks in the exhaust system, intake manifold, vacuum lines
Engine misfire condition present (look for P0300 series codes)
Fuel system too lean (possible low fuel pressure, water in fuel)
Video Guide
Diagnostic Info
- DTC Code: P0143
- Brand: Cadillac