Nissan Patrol P1260 Engine Trouble Code
What is Nissan Patrol P1260?
Nissan Patrol P1260 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
P1260 on the Nissan Patrol
Transmission-mounted speed sensors on the Nissan Patrol share a ground path with the engine control module. A corroded ground point on the transmission bell housing generates electrical noise that the ECU misinterprets as a P1260 fault condition.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Nissan Patrol |
| Brand: | Nissan |
| Model: | Patrol |
| Code: | P1260 |
P1260 Nissan Patrol Symptoms
Check Engine Light
Illuminated Nissan Patrol dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Nissan Patrol
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Nissan Patrol
Increased Emissions
Failed emissions test due to P1260
P1260 Code Structure
Understanding what each digit means in the P1260 powertrain trouble code:
| P | 1 | 2 | 6 | 0 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Manifold Absolute Pressure/Barometric Pressure Circuit High Input | Cylinder 4 Contribution/Balance Fault | Shift Solenoid E Performance or Stuck Off |
How to Fix Nissan Patrol P1260
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Power steering pressure switch monitors system operation. If pressure changes are not detected after calibrated speed transitions, this DTC sets. Verify PSP switch operation and check for circuit opens or shorts.
Technical Notes:
P1260 DTCs can be triggered by upstream issues. For example, a dirty MAF sensor may cause incorrect fuel-trim adjustments, leading oxygen sensors to report mixture problems. Address root causes first.
Nissan Patrol P1260 Repair Cost
ECU software update for the Nissan Patrol to resolve the P1260 calibration bug is performed free of charge at a franchised Nissan dealer under the technical service bulletin programme. Always confirm the ECU part number and current flash version before spending money on sensors.
P1260 Description
P1260 OBD-II Trouble Code: Theft Detected Vehicle Immobilized is one of the definitions for the P1260; however your vehicles manufacturer may have a different definition for the P1260 code. Please check below for your specific
Main Cause
The primary reason for P1260 OBD-II Engine Trouble Code is: Manifold Absolute Pressure/Barometric Pressure Circuit High Input.
Common P1260 Misdiagnosis on the Nissan Patrol
Replacing the PCM/ECU on the Nissan Patrol for a persistent P1260 is a last-resort action that is often performed prematurely. Statistically, less than 2% of P1260 faults on this platform originate in the ECU; wiring, sensors, and mechanical causes account for the remainder.
DIY Repair Guide: P1260 on Nissan Patrol
For the Nissan Patrol, an EGR valve inspection is a useful DIY step before spending money on diagnosis. Remove the valve (2–4 bolts depending on generation), inspect for carbon build-up, and use carburettor cleaner and a soft brass brush to clean the valve face and seat.
Preventing P1260 on the Nissan Patrol
Inspecting the Nissan Patrol wiring harness conduit grommets annually — especially the floor pan grommet — costs nothing and takes 10 minutes. Catching moisture ingress early eliminates the most common electrical trigger for P1260 on this model.
Frequently Asked Questions — Nissan Patrol P1260
A: Clearing the code without repair allows the fault condition to persist. Depending on the cause, this can lead to catalytic converter damage, increased fuel consumption, and secondary component failures that are significantly more expensive to address than the original fault.