C1711 on 2004-2006 Infiniti Q45: Rear Left TPMS Sensor Fault Guide

What's Unique About the 2004-2006 Infiniti Q45

For this generation of Infiniti vehicles, a known issue is sensitivity to radio frequency (RF) interference, which can interrupt the signal between the TPMS sensor and the receiver. Infiniti issued a Technical Service Bulletin (TSB #ITB13039A, also referenced as NTB13-088a) acknowledging that external devices like aftermarket phone chargers, dash cams, or even certain toll passes can cause a 'No Data' condition, leading to codes like C1711. This means that before replacing parts, it's crucial to check for and remove any new electronic devices plugged into the vehicle's power outlets.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• TPMS warning light flashes for approximately one minute at startup, then stays illuminated solid.
• The vehicle's information display, if equipped, will not show a pressure reading for the rear left tire.
• The TPMS light will not turn off even after verifying and correcting the pressure in all four tires.

Most Likely Causes

1. Dead TPMS Sensor Battery 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor The TPMS sensors from this era have non-replaceable batteries with a finite lifespan, typically 7-10 years. For a 2004-2006 vehicle, they are well past their expected service life, making battery failure the most common cause.
   How to confirm: Use a TPMS diagnostic tool to attempt to 'wake up' or read the sensor. If the tool cannot get a response (no ID, pressure, or temperature reading) from the rear left sensor, the sensor has failed, most likely due to a dead battery.
   Typical fix: Replace the rear left TPMS sensor and perform the TPMS relearn procedure. It is highly recommended to replace all four sensors at the same time, as the others are likely near failure and this will save on future labor costs.
   Est. part cost: $40-$120
2. Radio Frequency (RF) Interference 🟡 Medium Probability As noted in TSB ITB13039A, these models are susceptible to RF interference from aftermarket electronics plugged into the car's power outlets. The bulletin specifically calls out cell phone chargers as a common culprit.
   How to confirm: Unplug all aftermarket electronic devices (phone chargers, dash cams, FM transmitters, etc.). Clear the code and drive the vehicle for 10-15 minutes at speeds over 25 mph to see if the code returns. If it does not, one of the devices was the cause.
   Typical fix: Remove or replace the interfering electronic device with a higher quality, better-shielded alternative.
   Est. part cost: $0
3. Failed TPMS Sensor ⚪ Low Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor Beyond the battery, the sensor's electronics can fail from age, moisture intrusion from a bad valve stem seal, or physical damage during tire service.
   How to confirm: If the sensor's battery is confirmed to be good (which is unlikely given the vehicle's age) but it still won't communicate, the sensor itself has failed. This is confirmed if a TPMS tool can read the sensor ID, but the relearn procedure repeatedly fails.
   Typical fix: Replace the rear left TPMS sensor and perform the relearn procedure.
   Est. part cost: $40-$120

Rare But Worth Checking

• Faulty TPMS Receiver / Body Control Module (BCM): This is very rare. If none of the sensors can be registered or read by the system, the central receiver (often integrated into the BCM on these vehicles) may be at fault. This usually triggers codes for multiple sensors (e.g., C1708, C1709, C1710, C1711), not just one.

Diagnosis Steps

1. Verify the TPMS warning light behavior: flashes for ~1 minute, then stays on solid. This confirms a system fault, not low pressure.
2. Scan the BCM/TPMS module for codes using an OBD-II scanner capable of reading 'C' (Chassis) codes. Confirm C1711 is present.
3. Disconnect all non-essential, aftermarket 12V accessories (phone chargers, dash cams, etc.) to eliminate potential RF interference.
4. Clear the DTCs and drive the vehicle at over 25 MPH for several minutes to see if the code returns. If it does not, an accessory was the cause.
5. If the code returns, use a TPMS activation tool to attempt to read the data from the rear left sensor (ID, pressure, temperature, battery status).
6. If the tool cannot get a response, the sensor has failed (likely dead battery) and must be replaced.
7. If the tool CAN read the sensor, but the car cannot, the sensor's ID may not be properly registered. Attempt the TPMS relearn procedure.
8. If the relearn procedure fails with a sensor that is transmitting, the issue may be with the vehicle's TPMS receiver or wiring, though this is rare.
9. After replacing the sensor, use the TPMS tool to perform the relearn procedure to register the new sensor ID with the BCM.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #40700-CD001, 40700-AR300) — This is the component that fails, usually due to its internal battery expiring after 7-10 years. The entire unit must be replaced as the battery is not serviceable. The sensors for this vehicle operate at 315 MHz. Part number 40700-CD001 is correct for 2004-2006 models, while 40700-AR300 is for earlier 2002-2003 models.
  Trusted brands: Infiniti (OEM), Schrader, Continental, Dorman, Standard Motor Products
  OEM price range: $75-$120
  Aftermarket price range: $40-$70

Related Codes That Often Appear With This One

• C1708, C1709, C1710 — These are the corresponding 'No Data' codes for the other three wheels (Front-Left, Front-Right, Rear-Right). If you see them together, it could point to a systemic issue like a faulty TPMS receiver, widespread RF interference, or simply that all sensor batteries are failing due to age.

Technical Service Bulletins (TSBs) & Recalls

• ITB13039A / NTB13-088a: Discusses various TPMS topics, including radio frequency interference causing a 'No Data' condition for codes C1708, C1709, C1710, and C1711.

Platform-Specific Known Issues

• Infiniti TSB ITB13039A specifically calls out that radio frequency interference from accessories can cause a 'No Data' condition for code C1711 on these vehicles.
• Some owners on Nissan/Infiniti forums have attempted a manual relearn procedure involving grounding a specific wire near the OBD-II port, but this is not officially recommended and success varies by model year and system. A dedicated TPMS tool is the reliable method.
🎬 Watch: How some owners attempt a manual TPMS reset.

Scan Tool Commands That Help

• Infiniti CONSULT-II / CONSULT-III: ID REGIST (under BCM > AIR PRESSURE MONITOR > WORK SUPPORT) — This is the factory-level command required to write the unique ID of a new TPMS sensor into the Body Control Module (BCM) after replacement.
• Infiniti CONSULT-II / CONSULT-III: SELF-DIAGNOSTIC RESULTS (under BCM) — Used to confirm the specific DTCs stored in the BCM and can display results from the system's self-check, pointing to which transmitter is not communicating.
• Infiniti CONSULT-II / CONSULT-III: DATA MONITOR — Allows a technician to view the live data that the BCM is receiving (or not receiving) from each individual tire pressure sensor, which can help confirm a 'No Data' condition for the left rear wheel.

Wiring & Ground Locations

• Body Control Module (BCM) — Located in the driver's kick panel area, under the dashboard. The TPMS receiver is integrated into this module for this vehicle generation.. The BCM is the central computer that receives the signals from all TPMS sensors. All diagnostic paths for C1711 originate from or lead to the BCM, as it is what determines that the signal from the left rear sensor is missing.
• Tire Pressure Warning Check Connector — A single-wire connector, often white, typically taped to the main wiring harness near the OBD-II port under the driver's side dash.. This connector is used for a tool-free, manual relearn procedure. By grounding the pin in this connector a specific number of times with the ignition on, the BCM can be put into 'learning mode' to register sensors, which can be a workaround if a dedicated TPMS scan tool is not available.

Real Owner Repair Stories

• YouTube video by Paul Dark (Nissan SUV (similar TPMS system)) — TPMS warning light was on and would not reset through normal driving.
  ❌ Tried (didn't work) Driving the vehicle to force an automatic relearn., Using a dealership scan tool was presented as an expensive alternative.
  ✅ What actually fixed it A manual relearn procedure was successfully performed without special tools. The technician located the white TPMS test connector near the OBD-II port, turned the ignition ON (engine off), and tapped a paperclip from the connector's pin to a chassis ground six times. This caused the TPMS light to start flashing, indicating it was in learning mode. After driving, the system reset and began functioning correctly with the existing sensors.
• YouTube video by 'fix it' (2012 Infiniti G37 (similar TPMS architecture)) — TPMS light remained on despite attempting the manual paperclip reset procedure. All four tire sensors were confirmed to be transmitting a signal with a TPMS tool.
  ❌ Tried (didn't work) Manual relearn procedure using the test connector and a paperclip., Verifying that all four wheel sensors were transmitting properly.
  ✅ What actually fixed it The issue was a faulty TPMS control module (receiver). The technician replaced the module, which was located behind the glove box on this particular model. After replacing the used module, the system was able to register the sensors and the light was extinguished. This highlights a rare but possible failure of the receiver itself when sensors are known to be good.

OEM Part Supersession History

• 40700-CD000 → 40700-CD001 — Standard part revision and update by the manufacturer.
• 40700-AR300 → N/A — This part number is for a different model year range.
  Heads up: Part number 40700-AR300 is specified for the 2002-2003 Infiniti Q45. While it may physically fit, it should not be used on a 2004-2006 model, which requires part number 40700-CD001 to ensure correct communication protocol with the BCM.

Model Year Variations Within This Range

• 2004-2006: The correct OEM TPMS sensor for the 2004-2006 Q45 is part number 40700-CD001. Earlier 2002-2003 models used a different part (40700-AR300). Using the wrong part number, even if it operates on the same 315 MHz frequency, may result in a failure to register with the vehicle's BCM.