Signal Too Low
Signal too low
Checking software
Checking software
Checking software
Note! The information below only applies to modal year 2003-2004.For other model years, select the alternative "No".
It may be possible to remedy the fault by downloading new software into the control module.
Action
- Go to the tab software and program the control module with the latest software.
Other information
- For more information, see Design and Function.
Has the fault been remedied?
Yes - Fault Found
No - No Fault Found
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FAULT FOUND - Fault Found
No Fault Found - heating
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Diagnostic trouble code (DTC) status ECM-2210 Rear heated oxygen sensor (HO2S), heating
Note! When reading off the Diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.
Read off the Diagnostic trouble code (DTC) status. Check the status of the relevant Diagnostic Trouble Code (DTC).
Was the status of the relevant Diagnostic Trouble Code (DTC) displayed as permanent?
Yes - Checking wiring and components
No - Checking wiring and connectors
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Checking wiring and connectors
Caution! Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
Check cable between control module #A11 and rear heated oxygen sensor (HO2S) #2 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Other information
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access the control module, see
- To access/replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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Attempt New Test - heating
FAULT FOUND - DONE
DONE - DONE
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Checking wiring and components
Caution! Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.
Check the resistance of the rear heated oxygen sensor (HO2S) element between #1 and #2. Resistance should be approximately 5.0 - 6.8 ohms at 20°C (68°F).
Check heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between control module #A11 and rear heated oxygen sensor (HO2S) #2 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check cable between rear heated oxygen sensor (HO2S) #1 and fuse 2 in the R/S box for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Other information
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access the control module, see
- To access/replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Start the engine and let it idle.
- Read off the signal for the rear heated oxygen sensor (HO2S).
Note! It takes approximately 50 seconds before fuel trim starts.
Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V.
Is the value OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - heating
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