G3/5 (Left O2 sensor, after TWC [KAT]) : Short circuit between signal line and line to sensor heater (P0156)

P0156
G3/5 (Left O2 sensor, after TWC [KAT]) : Short circuit between signal line and line to sensor heater (P0156)
Test 1: Check component G3/5 (Left O2 sensor, after TWC [KAT]).
Test 2: Possible cause:
­ G3/5 (Left O2 sensor, after TWC [KAT])
Affected functions:
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Engine diagnosis
Exhaust system
1. Check component G3/5 (Left O2 sensor, after TWC [KAT]).
Warning!Communication with ECU required.
2. No further information available.