LEMON Manuals: Even more car manuals for everyone
Home >> Volvo >> 2001 >> S80 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 5 Of 11 >> ECM-2B2A: Rear Lambda Probe Pre-Heating, Bank 2. Signal Too High. Permanent Fault. (B6284T; 1999-2001) >> Signal too high. Permanent fault >> Checking wiring and components >> Notes

Checking wiring and components: Notes

Check the heated oxygen sensor (HO2S) resistance between #1 and #2.

Check signal cable between heated oxygen sensor (HO2S) #2 and engine control module (ECM) #A36 (#A36) for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults

HINT: Use an electrician's screwdriver with at least a 3 W bulb to determine whether the cable is short-circuited to supply voltage. 

Remedy as necessary.

Other information 

Fig 1: Identifying Rear Heated Oxygen Sensor (HO2S) Connector
GLL104129Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Voltage Display
GLL101041Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Rear Heated Oxygen Sensor (HO2S)
GLL102933Courtesy of VOLVO CARS OF NORTH AMERICA.