DTC U1254 Isuzu
O2 Sensor Circuit Low Voltage
O2 Sensor Circuit Low Voltage
Description
Control module detected an unexpected low voltage condition on the O2S circuit during the CCM test period.
Cause and Solution
Check any other DTC on display Using the a scan tool, check current data Check Harness between Control module and rear oxygen sensor connector Check exhaust system Faulty rear oxygen sensor
Video Guide
Diagnostic Info
- DTC Code: U1254
- Brand: Isuzu