Nissan 300 P1260 Engine Trouble Code
What is Nissan 300 P1260?
The Nissan 300 P1260 check-engine light can indicate issues ranging from minor (loose gas cap) to serious (catalytic converter failure). Professional diagnostic scanning at a dealer or shop will identify the exact cause and required repairs.
P1260 on the Nissan 300
Owners who tow regularly with their Nissan 300 should pay extra attention to P1260. The additional thermal load placed on the transmission fluid accelerates the degradation of the torque converter clutch solenoid, a frequent secondary cause of this code.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Nissan 300 |
| Brand: | Nissan |
| Model: | 300 |
| Code: | P1260 |
P1260 Nissan 300 Symptoms
Check Engine Light
Illuminated Nissan 300 dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Nissan 300
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Nissan 300
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 300 P1260
Diagnostic Steps:
Check if fuel pump primes when key is turned to ON. Measure fuel pressure and verify bright white-blue spark at all plugs. Also verify mechanical timing alignment.
Repair Solution:
Brake switch circuit concerns may involve open or shorted BPP circuits, damaged switches, or misadjustment. Verify stoplight function and follow proper self-test procedures per service manual.
Technical Notes:
P1260 DTC indicating a sensor fault does not always mean the sensor itself is bad. The issue may stem from the systems being monitored or even the sensor wiring. Proper diagnosis is essential.
Nissan 300 P1260 Repair Cost
MAF sensor replacement on the Nissan 300 for a P1260 fault runs $220–$380 at a franchised dealer. OEM-equivalent aftermarket sensors are available for $80–$130 and are a reliable option for vehicles outside the factory warranty period.
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 300
On the Nissan 300, the EGR cooler is sometimes replaced for P1260 when the EGR valve position sensor is at fault. The two components share a fault pathway in older scan tools that do not display live EGR valve position data.
DIY Repair Guide: P1260 on Nissan 300
Replacing the spark plugs on the Nissan 300 is rated a difficulty 2/5 for home mechanics. The top-mounted plug access on this engine requires a 3/8" extension and a 14mm spark plug socket. Always torque to the manufacturer's specification to avoid cracking the cylinder head.
Preventing P1260 on the Nissan 300
The Nissan 300 coolant temperature sensor plays a role in fuel enrichment during warm-up. Replacing it as a precaution at 80,000 miles ($25–$40 DIY) prevents the faulty cold-start enrichment that can lead to P1260.
Frequently Asked Questions — Nissan 300 P1260
A: Yes. A weak battery causes voltage drop during cranking that confuses the ECU and can store a range of fault codes. Always rule out battery and charging system health before diagnosing sensor-related codes.