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DTC P0052 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200001206

DTC P0052 | HO2S heater (Front, LH) circuit high
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DETECTION CONDITION | • The PCM monitors the HO2S heater (Front, LH) control signal at PCM terminal 94. If the PCM turns the front heater (LH) on but front heater (LH) circuit has high voltage, the PCM determines that the HO2S heater (Front, LH) circuit has malfunction.

  Note

  • The HO2S heater (Front, LH) is controlled by a duty signal.

Diagnostic support note
• This is a continuous monitor (O2 sensor heater).
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.
POSSIBLE CAUSE | • Short to power circuit between HO2S (Front, LH) terminal D and PCM terminal 94 • Shorts front HO2S or PCM terminal • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on repair order, then go to the next step.
2 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT HO2S (FRONT, LH) TERMINAL • Turn the ignition switch off. • Disconnect the HO2S (Front, LH) connector. • Inspect for bent terminals. • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 7.
No | Go to the next step.
4 | INSPECT HO2S HEATER (FRONT, LH) • Inspect the HO2S heater (front, LH). (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).) • Is the HO2S heater (front, LH) normal? | Yes | Go to the next step.
No | Replace the HO2S (Front, LH), then go to Step 7.
5 | INSPECT PCM TERMINAL • Disconnect the PCM connector. • Inspect for bent terminals. • Is there any malfunction? | Yes | Repair the terminal, then go to Step 7.
No | Go to the next step.
6 | INSPECT HO2S (FRONT, LH) HEATER CONTROL CIRCUIT FOR SHORT TO POWER CIRCUIT • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between HO2S (Front, LH) terminal D (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace the wiring harness for short to power circuit, then go to the next step.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0052 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the PENDING CODE of same DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.