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Plugged my Mk6 Ford Fiesta into Forscan Lite today, and got the following faults below.

Was curious to see that both the 021 and 022 flatline at near zero volts at 2000 rpm. That's not normal is it?

At 2750 rpm and engine warmed up, both sensors have wide fluctuations, which possibly suggests the cat is gone?

O21 graph waves look too slow to me.

The heater circuits seem to be switching fine on the harness side when you disconnect the sensors and put a test lamp across the heater wires on harness side. The bulb flashes with engine running. Have resistance reading across heater sensors.

Any thoughts.

Thanks

===PCM DTC P0693-60=== Code: P0693 - High speed fan output circuit malfunction - short to ground.

Status:

  • DTC Present at Time of Request
  • Malfunction Indicator Lamp is Off for this DTC

Module: Powertrain Control Module

Diagnostic Trouble Code details

High speed fan output circuit malfunction - short to ground.

===END PCM===

===PCM DTC P0646-60=== Code: P0646 - Air conditioning clutch relay circuit short to ground.

Status:

  • DTC Present at Time of Request
  • Malfunction Indicator Lamp is Off for this DTC

Module: Powertrain Control Module

Diagnostic Trouble Code details

Air Conditioning Clutch Relay Control Circuit Low

Ignore this DTC if the vehicle does not have AC fitted.

This DTC may be caused by :

Air conditioning clutch relay circuit short to ground.

Open Circuit

Air conditioning clutch

===END PCM===

===PCM DTC P0420-F0=== Code: P0420 - Catalyst system efficiency below threshold (bank 1)

Module: Powertrain Control Module

Diagnostic Trouble Code details

Catalyst system efficiency below threshold (bank 1)

This DTC may be caused by :

Aged or damaged catalytic converter.

It is important that the cause of the failure is investigated before the catalytic converter is renewed

The failure may be caused by one or more of the following:

Engine misfire

Check for engine misfire DTCs

Impact damage to the exhaust or catalyst assembly

Damaged plugs/leads/coils

Perform the ignition test

Use of diesel or leaded fuel

Engine oil contamination.

Engine Oil Level Too High

Make sure engine oil consumption is not excessive.

Renew the catalytic converter

===END PCM===

===PCM DTC P0030-E0=== Code: P0030 - HO2S Heater Control Circuit (Bank 1, Sensor 1)

Status:

  • DTC Present at Time of Request
  • Malfunction Indicator Lamp is On for this DTC

Module: Powertrain Control Module

Diagnostic Trouble Code details

HO2S Heater Control Circuit (Bank 1, Sensor 1)

This DTC may be caused by :

Open Circuit

HO2S11 circuit malfunction

Suspect HO2S11.

===END PCM===

===PCM DTC P0037-E0=== Code: P0037 - HO2S Heater Control Circuit Low Voltage (Bank 1, Sensor 2)

Status:

  • DTC Present at Time of Request
  • Malfunction Indicator Lamp is On for this DTC

Module: Powertrain Control Module

Diagnostic Trouble Code details

HO2S Heater Control Circuit Low Voltage (Bank 1, Sensor 2)

This DTC may be caused by :

Short to Ground

Suspect HO2S12.

===END PCM===

===OBDII DTC P0030-C=== Code: P0030 - HO2S Heater Control Circuit (Bank 1, Sensor 1)

Status:

  • Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

HO2S Heater Control Circuit (Bank 1, Sensor 1)

This DTC may be caused by :

Open Circuit

HO2S11 circuit malfunction

Suspect HO2S11.

===END OBDII===

===OBDII DTC P0420-C=== Code: P0420 - Catalyst system efficiency below threshold (bank 1)

Status:

  • Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

Catalyst system efficiency below threshold (bank 1)

This DTC may be caused by :

Aged or damaged catalytic converter.

It is important that the cause of the failure is investigated before the catalytic converter is renewed

The failure may be caused by one or more of the following:

Engine misfire

Check for engine misfire DTCs

Impact damage to the exhaust or catalyst assembly

Damaged plugs/leads/coils

Perform the ignition test

Use of diesel or leaded fuel

Engine oil contamination.

Engine Oil Level Too High

Make sure engine oil consumption is not excessive.

Renew the catalytic converter

===END OBDII===

===IC DTC === Successful DTC reading, no error codes found

Module: Instrument Cluster ===END IC===

===RCM DTC === Successful DTC reading, no error codes found

Module: Restraint Control Module ===END RCM===

===GEM DTC === Successful DTC reading, no error codes found

Module: Generic Electronic Module ===END GEM===


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