C1706 – Low pressure (right rear) (Nissan)

Nissan-specific code — factory diagnostic data

C1706 means the Nissan Leaf has detected low tire pressure at the right rear. You will usually see a tire pressure warning, and the vehicle may feel less stable. According to Nissan factory diagnostic data, this is a Nissan-defined chassis code that the Air pressure monitor sets for “Low pressure (right rear).” That description tells you the suspected trouble area. It does not prove a sensor failed. Start with a real pressure check at the valve stem. Then confirm the Air pressure monitor agrees with reality before you replace parts.

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C1706 Quick Answer

C1706 on a Nissan Leaf points to low pressure at the right rear tire as reported to the Air pressure monitor. Confirm the actual tire pressure first, then verify the TPMS data and signal integrity.

What Does C1706 Mean?

Official meaning: Nissan defines C1706 as “Low pressure (right rear)” in the chassis system, stored by the Air pressure monitor. In plain terms, the module decided the right rear tire pressure dropped below its learned or expected range. That matters because tire pressure affects braking distance, steering response, and tire temperature.

What the module checks: The Air pressure monitor does not “measure” air directly. It evaluates the right rear wheel’s reported pressure value from the tire pressure sensor system. It also checks plausibility, reception quality, and whether the reported value stays low long enough to qualify as a fault. For diagnosis, treat C1706 as a direction to verify pressure accuracy, correct wheel identification, and the RF signal path before you condemn any component.

Theory of Operation

On Nissan vehicles, the tire pressure sensor in each wheel transmits a pressure value by radio frequency. The receiver side and Air pressure monitor interpret the message and assign it to a wheel position. The cluster then commands the warning lamp when pressure falls too low.

C1706 sets when the Air pressure monitor decides the right rear value indicates low pressure, or when the data it receives makes the right rear reading appear low. A real leak causes the most direct low reading. A mislearned sensor ID, weak transmission, or interference can also make one position report incorrectly.

Symptoms

You will usually notice a tire pressure warning first, then handling or tire behavior changes.

• Warning lamp TPMS or tire pressure warning illuminates
• Message Low tire pressure message for the right rear may display
• Handling Vehicle may feel softer, floaty, or less precise in turns
• Pull Steering pull may appear if pressure differs side to side
• Tire noise Increased road noise or thump from the right rear
• Ride Harsher impacts if the tire runs underinflated and deforms
• Tire wear Rapid shoulder wear on the right rear over time

Common Causes

• Actual right-rear tire underinflation: The air pressure monitor detects a pressure value below its low-pressure threshold for that wheel position.
• Seasonal temperature drop or rapid ambient change: Cooler air reduces tire pressure, which can push a marginal tire below the monitor’s low-pressure limit.
• Leak at the valve stem, core, or bead seat: A slow leak drops pressure over time and repeatedly triggers the low-pressure detection after key cycles.
• Tire puncture or sidewall damage: Small tread punctures or sidewall issues cause a faster pressure loss that sets the code quickly.
• TPMS sensor reporting error on the right rear: A weak sensor battery or internal sensor fault can transmit an implausibly low pressure value.
• Incorrect sensor ID registration or wheel position mismatch: The monitor may associate the right-rear position with the wrong transmitter and flag low pressure at that position.
• RF communication interference or poor signal reception: Intermittent reception can corrupt or drop packets and lead to invalid pressure interpretation on some Nissan platforms.
• Non-OE wheel/tire configuration or improper tire size: Certain combinations change how the system learns and validates signals, which can contribute to position or plausibility issues.

Diagnosis Steps

Tools: Use a scan tool that accesses Nissan TPMS/Air pressure monitor data, plus a quality tire pressure gauge. Have an air source, a spray bottle with soapy water, and a DMM for power and ground checks. If available, use a TPMS activation tool to trigger sensors and confirm IDs and pressure reporting.

1. Confirm C1706 and record all DTCs from the Air pressure monitor and any related chassis modules. Review freeze frame data for battery voltage, ignition state, vehicle speed, and any TPMS-related status items. Freeze frame shows the exact conditions when the code set.
2. Perform quick triage before any meter work. Verify the right-rear tire pressure with a known-good gauge and compare it to the placard spec. Inspect the tire for visible damage, an embedded object, and a loose valve cap or stem.
3. Check fuses and power distribution feeding the Air pressure monitor system. Verify you have correct supply at the fuse output under load, not just continuity. A weak feed can cause erratic interpretation and repeated faults.
4. Verify Air pressure monitor power and ground integrity with voltage-drop testing under load. Back-probe the module power and ground circuits while the circuit operates. Accept less than 0.1 V drop on the ground side with the module active.
5. Inspect connectors and harness routing related to the Air pressure monitor and any associated receiver/antenna circuits used on the Leaf platform. Look for water intrusion, backed-out terminals, corrosion, and harness pinch points. Pay close attention to areas near body seams and under-trim routing.
6. Use the scan tool data list to compare the right-rear reported pressure to the other three wheels. Look for a pressure value that reads much lower, does not update, or behaves erratically. If the right-rear value updates normally and matches your gauge, treat the code as an intermittent or position/ID issue.
7. Distinguish code status before chasing intermittents. If the DTC shows as pending only, a Type B logic may require two consecutive trips to confirm it. If the code returns immediately after clearing, treat it as a hard fault and focus on a real low-pressure condition or a sensor/reporting issue.
8. If pressure reads low on the scan tool and on the gauge, inflate to spec and perform a leak check. Use soapy water at the tread, valve stem, valve core, and bead seats. Recheck pressure after time passes to confirm the leak rate.
9. If the gauge shows correct pressure but the scan tool reports low for the right rear, trigger that wheel’s sensor with a TPMS tool if supported. Confirm the sensor transmits, the monitor receives it, and the displayed pressure matches. If the tool shows normal pressure but the vehicle displays low, suspect position assignment, ID registration, or reception issues.
10. Verify sensor ID registration and wheel position logic per Nissan service information for the Leaf. Confirm the right-rear position matches the installed sensor ID. If the vehicle recently had tire service, rotation, or wheel replacement, correct the registration and perform the required learn procedure.
11. Use a scan tool snapshot during a controlled drive if the issue occurs intermittently. Freeze frame captured the original set event, but a snapshot lets you catch a drop-out or sudden pressure change live. Monitor right-rear pressure update rate, signal status, and any related TPMS flags while duplicating the customer’s conditions.
12. Clear codes and confirm the repair. Verify the right-rear pressure reads correctly, updates consistently, and the DTC does not return after key cycles and a road test. Recheck for pending codes after the monitor runs again.

Professional tip: Do not condemn a TPMS sensor based on a single low reading. First match the scan tool value to a trusted gauge and verify position learning. On Nissan systems, a wheel position mismatch after rotation can mimic a low-pressure fault. Confirm module power and grounds with a voltage-drop test before you chase RF or replace parts.

Possible Fixes

• Inflate the right-rear tire to the placard specification and verify the warning and code reset after the monitor updates.
• Repair the leak source, such as a puncture, bead leak, or valve core issue, then verify the pressure holds.
• Replace a damaged valve stem or service the sealing surfaces if the leak originates at the stem or bead.
• Correct TPMS sensor ID registration and perform the required Nissan learn/relearn procedure for proper wheel position tracking.
• Replace the right-rear TPMS sensor only after confirming inaccurate pressure reporting or confirmed transmission failure.
• Repair power/ground, connector, or harness issues found during inspection and voltage-drop testing, then retest for repeat faults.

Can I Still Drive With C1706?

You can usually drive the Nissan Leaf with C1706, but treat it as a tire safety warning first. This Nissan manufacturer-specific chassis code means the Air pressure monitor sees low pressure at the right rear. Low pressure changes braking distance and stability behavior. It also raises the risk of a tire failure at speed. Before any long drive, stop and verify the right-rear tire condition. Check for obvious damage, a puncture, or a separated sidewall. Inflate to the pressure listed on the door placard, not the tire sidewall. If the tire will not hold air, do not keep driving. Use a spare or tow the vehicle.

How Serious Is This Code?

C1706 ranges from an inconvenience to a real safety issue. It stays minor when the tire pressure only dropped due to temperature changes and the tire holds air after you inflate it. It becomes serious when pressure drops repeatedly, or the tire shows visible damage. It also becomes serious when you feel vibration, pulling, or a “thump” that changes with speed. Those signs point to structural tire problems, not a sensor issue. Do not assume a TPMS sensor caused the warning. Per SAE J2012 guidance, the DTC points to a suspected area only. Confirm the actual pressure with a known-good gauge before you chase electronics.

Common Misdiagnoses

Technicians often replace the right-rear TPMS sensor as soon as they see “low pressure.” That wastes money when the tire has a leak or the valve core seeps. Another common miss involves trusting the dash display without verifying gauge pressure. Gauge accuracy and the correct units matter. Shops also overlook wheel swaps or tire rotations. The Air pressure monitor may still associate a sensor ID with “right rear” until relearn completes. Some people clear codes before fixing the leak. That resets evidence and delays confirmation. Avoid these errors by verifying pressure, leak-testing the tire and valve, then checking scan data and sensor ID placement.

Most Likely Fix

The most common repair path starts with correcting an actual low-pressure condition. Inflate the right-rear tire to the placard specification and repair the leak if pressure drops again. That usually means a puncture repair, valve core service, bead reseal, or replacing a damaged tire. If pressure stays correct but C1706 returns, move to verification of the TPMS sensor signal and ID location. Confirm the Air pressure monitor shows plausible right-rear pressure and temperature. Then verify the sensor matches the wheel position and complete Nissan’s TPMS ID registration procedure when needed.

Repair Costs

Repair cost depends on whether the confirmed root cause is wiring, connector condition, a sensor, a module, or the labor needed to diagnose the fault correctly.

Last updated: April 10, 2026

Definition source: Nissan factory description · Autel MaxiSys Ultra & EV. Diagnostic guidance is based on factory-defined fault logic for this code.