The most common causes of P1550 include: Sensor failure or signal out of range; Wiring harness damage or loose connection; Control module software issue; Vacuum leak or air intake restriction. A professional OBD-II scan tool is recommended for accurate diagnosis.

How do I fix P1550 for Nissan LEAF?

Recommended steps to address P1550: (1) Schedule service as soon as possible (2) Check and replace the affected sensor if confirmed faulty (3) Inspect wiring and connectors for damage. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with P1550?

Driving with P1550 is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

Nissan LEAF

P1550

Warning

Intake Manifold Runner Control (Bank 1) Stuck Open

Severity

Warning

What does P1550 mean?

Fault code P1550 means "Intake Manifold Runner Control (Bank 1) Stuck Open". It is a manufacturer-specific diagnostic trouble code (DTC) in the powertrain system, classified as "powertrain" with a severity level of "warning". This code indicates a condition that should be addressed soon. Schedule a diagnostic appointment within the next few days to prevent further damage. This code is defined by the SAE J2012 / ISO 15031-6 standard and applies to OBD-II compliant vehicles sold in the US, EU, and other global markets. [Nissan EV-specific: Battery Current Sensor Circuit Malfunction. Applies to: Nissan LEAF (2010+), Nissan LEAF e+ (2019+)]

Possible Causes

Sensor failure or signal out of range
Wiring harness damage or loose connection
Control module software issue
Vacuum leak or air intake restriction

Recommended Actions

1 Schedule service as soon as possible
2 Check and replace the affected sensor if confirmed faulty
3 Inspect wiring and connectors for damage

This code applies to all vehicles. View generic P1550 information →