DTC P0053[AJ (3.0L Duratec)]
id0102a4816400
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DTC P0053 |
Front HO2S (RH) heater resistance |
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DETECTION CONDITION
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• Heater current requirements too low or high in front HO2S (RH) heater control circuit
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POSSIBLE CAUSE
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• Front HO2S (RH) heater malfunction
• Connector or terminal malfunction
• Open circuit in wiring between main relay and front HO2S (RH) terminal C
• Open circuit in wiring between front HO2S (RH) terminal A and PCM terminal 93
• Short to ground in wiring between front HO2S (RH) terminal A and PCM terminal 93
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to next step.
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No
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Record FREEZE FRAME DATA on repair order, then go to next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
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No
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Go to next step.
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3
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INSPECT FRONT HO2S (RH) CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the front HO2S (RH) connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
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Yes
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Repair or replace terminals, then go to Step 8.
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No
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Go to next step.
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4
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect PCM connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
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Yes
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Repair terminal, then go to Step 8.
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No
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Go to next step.
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5
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INSPECT FRONT HO2S (RH) HEATER POWER CIRCUIT FOR OPEN CIRCUIT
• Turn ignition switch to the ON position.
• Measure the voltage between front HO2S (RH) terminal C and body ground.
• Is the voltage B+?
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Yes
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Go to next step.
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No
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Repair or replace suspected harness, then go to Step 8.
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6
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INSPECT FRONT HO2S (RH) HEATER CONTROL CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between front HO2S (RH) terminal A (harness-side) and PCM terminal 93 (harness-side).
• Is there any continuity?
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Yes
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Go to next step.
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No
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Repair or replace suspected harness, then go to next step.
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7
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INSPECT FRONT HO2S (RH) HEATER CONTROL CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch off.
• Inspect for continuity between front HO2S (RH) terminal A (harness-side) and body ground.
• Is there any continuity?
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Yes
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Repair or replace suspected harness, then go to next step.
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No
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Replace front HO2S (RH), then go to next step.
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8
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VERIFY TROUBLESHOOTING OF DTC P0053 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using M-MDS.
• Start engine.
• Perform “KOEO/KOER self-test”
• Is same DTC present?
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Yes
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Replace PCM, then go to next step.
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No
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Go to next step.
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9
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VERIFY AFTER REPAIR PROCEDURE
• Perform “AFTER REPAIR PROCEDURE”.
• Is there any DTC present?
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Yes
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Go to applicable DTC inspection.
(See DTC TABLE[AJ (3.0L Duratec)].)
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No
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Troubleshooting completed.
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