2020-2022 Hyundai Transaxle Position Sensor DTCs P070500, P070600

Hyundai has released Technical Service Bulletin (TSB) 23-AT-008H-1 to address diagnostic trouble codes (DTCs) related to the automatic transaxle position sensor in various 2020-2022 models. This TSB, which supersedes TSB 23-AT-008H, provides detailed procedures for diagnosing and replacing the Hyundai transmission range sensor to resolve shifting problems and other related symptoms. The previous TSB 23-AT-008H is superseded to add specific harness information for Tucson (NX4/NX4A) models in Step 7 of the repair procedure.

Symptoms

Owners of affected vehicles may experience one or more of the following symptoms:

• "Malfunction Indicator Light (MIL) illuminated"
• "5th gear fail-safe"
• "Intermittently won't shift into D or R"
• "Intermittently won't shift out of Park"
• "Intermittently no engine crank/no start in “P” or “N” with or without MIL or DTC."

Fault Codes / DTCs

If your vehicle is exhibiting these symptoms, a scan tool may reveal one or more of the following diagnostic trouble codes:

Important Warnings and Information

This TSB includes critical information for technicians and owners:

• Wiring Harness Damage: "Damage to the wiring harness may still be present, even if there is no external damage to the harness protector. Even slight damage to the wiring harness can cause these faults."
• Replacement Harness Installation: "If replacing the control harness, make sure the replacement harness does not contact the battery tray/other components. Otherwise, the harness may become damaged again."
• Warranty Claims: "Normal warranty applies." Claims should be submitted on the Claim Entry Screen as “Warranty” type. "Claim is subject to debit if the part requested is not returned." If a part is found to need replacement while performing this TSB and is still under warranty, a separate claim should be submitted. If the affected part is out of warranty, a Prior Approval request for goodwill consideration is required prior to performing the work.

Diagnosis and Repair Procedure Summary

The repair process for the Hyundai transmission range sensor involves several diagnostic and replacement steps:

1. Initial Check: Start the engine, connect a GDS (Global Diagnostic System), and check for DTCs in the "Automatic Transaxle" menu. Record and then delete any DTCs.
2. Current Gear Monitoring: Select "Data Analysis," "A/T menu," and "Current Gear" on the GDS. Depress the brake pedal and cycle the shift lever through all gears (P, R, N, D), observing the GDS and instrument cluster for correct gear indication. Turn the ignition off.
3. Wiring Harness Inspection: If the GDS does not show the correct current gear, visually inspect the wiring harness between the ECU and the position sensor (inhibitor switch) for damage, open circuits, short circuits, or improperly inserted pins. Repair or replace the control wiring if damage is found.
4. Ground Connection Check: Check the grounds for the electronic shift lever. Turn the ignition and headlights on, then use a DVOM to measure voltage drop between the wiring terminal and ground. The specification is "Less than 0.2 V." If the voltage drop is higher, clean and tighten the terminal and bolt threads to a torque of 79 lb-ft (1.01.2 kgf.m, 10~12 N.m).
5. Specific Harness Checks (Santa Fe & Tucson): For Santa Fe (TMa) 2.5L (VINs beginning with 5NM) and Tucson (NX4/NX4A) 2.5L (VINs KM8 or 5NM), carefully unwrap the harness protector. Check for insulation damage from contact with the battery tray (Santa Fe) or metal bracket (Tucson), and for broken wires in the 90-degree bend area (Tucson). Repair or replace the control harness as needed.
6. Component Removal: Remove retaining clips, the air intake duct, air cleaner, hoses, battery, and battery tray. Record radio presets before battery removal. Torque for battery tray bolts is 79 lb-ft (1.01.2 kgf.m, 10~12 M.m).
7. Sensor Disconnection: Disconnect the shift by wire (SBW) actuator connector and the position sensor connector.
8. Position Sensor Replacement: Remove the two mounting bolts and the old position sensor. Install a new position sensor, loosely tighten the bolts.
9. Manual Valve Alignment: Turn the manual valve two detents counter-clockwise to place it in the Neutral position, aligning it 90° to the radiator.
10. Sensor Installation & Torque: Install the correct alignment tool into the transmission and position sensor holes. Tighten both bolts to 79 lb-ft (1.01.2 kgf.m, 10~12 N.m).
11. Final Connections & Reassembly: Reconnect the position switch connector. Turn the manual valve two detents clockwise to the Park position. Reinstall the electronic shift actuator, tightening its bolts to 1519 lb-ft (23 kgf.m, 21~26 N.m). Reconnect the actuator harness.
12. Post-Repair Checks: Reinstall all removed parts in reverse order and reset radio stations. Clear the DTCs and test drive the vehicle for two "key-on to key-off driving cycles." If the DTC does not reappear, the repair is complete. If the DTC recurs, further inspection and potential replacement of the control wiring between the PCM/TCU and position sensor, or even the PCM (ECU/TCU) or TCU, may be necessary.

Required Parts and Tools

Specific parts and special service tools (SSTs) are required for this repair:

• PNC Codes: 42700E, 42700G
• Part Numbers: 42700-4G6**, 42700-2H0**
• Special Service Tools (SST):
  • 09459-4G100 (for Palisade (LX2), Santa Fe Hybrid (TM/TMa HEV), Sonata Hybrid (DN8 HEV), Tucson Hybrid (NX4 HEV))
  • 09459-4G200 (for Sonata (DN8/DN8A) 2.5L, Santa Fe (TMA) 2.5L, Tucson (NX4/NX4A) 2.5L)
  • Replacement SSTs can be obtained by contacting Bosch at 866-539-4248.

Warranty Claim Information

For warranty claims related to TSB 23-AT-008H-1, use the following codes:

• Operation Code: 42700R00 (Replace position sensor), 42700RH1 (Hybrid Additional), 42700RQ0 (GDS)
• Causal Part: 42700R00
• Nature Code: I3A
• Cause Code: ZZ3
• Labor time is determined by WEBLTS.

Source: NHTSA ID: 10248232