Nissan Murano P1C99 Engine Trouble Code
What is Nissan Murano P1C99?
With Nissan Murano P1C99, you may drive for several weeks with a malfunctioning MAF sensor, but expect decreased fuel economy and eventual stalling. Shop replacement costs $240–$400 depending on vehicle. The labour is straightforward, with most cost from the part itself.
P1C99 on the Nissan Murano
For Nissan Murano owners, diagnosing P1C99 correctly requires ruling out a faulty camshaft position sensor before replacing more expensive components. The sensor wiring harness on this model runs close to the exhaust manifold and is prone to heat-related insulation damage.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Vehicle: | Nissan Murano |
| Brand: | Nissan |
| Model: | Murano |
| Code: | P1C99 |
P1C99 Nissan Murano Symptoms
Check Engine Light
Illuminated Nissan Murano dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Nissan Murano
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Nissan Murano
Increased Emissions
Failed emissions test due to P1C99
P1C99 Code Structure
Understanding what each digit means in the P1C99 powertrain trouble code:
| P | 1 | c | 9 | 9 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Pump Module Control Circuit Range/Performance | Crankshaft Position Sensor A Circuit Malfunction | Reverse Input Circuit |
How to Fix Nissan Murano P1C99
Diagnostic Steps:
Poor running symptoms align with MAP sensor malfunction. In some cases, a faulty MAP sensor will not trigger a code. The issue may represent separate wiring concerns requiring individual diagnosis.
Repair Solution:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on P1C99 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
Nissan Murano P1C99 Repair Cost
Crankshaft reluctor ring inspection and replacement on the Nissan Murano is a major service item costing $600–$1,100. Given the labour required to access the component, it is advisable to replace the rear crankshaft seal and crankshaft position sensor simultaneously while the area is open.
P1C99 Description
P1C99 engine trouble code is related to Reverse Input Circuit.
Main Cause
The primary reason for P1C99 OBD-II Engine Trouble Code is: Fuel Pump Module Control Circuit Range/Performance.
Common P1C99 Misdiagnosis on the Nissan Murano
On Nissan Murano vehicles, the turbo boost solenoid and the MAP sensor feed into the same diagnostic path. P1C99 caused by a faulty boost solenoid is sometimes charged to the customer as a MAP sensor replacement, doubling unnecessary parts spend.
DIY Repair Guide: P1C99 on Nissan Murano
The coolant temperature sensor on the Nissan Murano is a straightforward DIY item (difficulty 2/5). Have a drain tray ready for the small amount of coolant that spills when the sensor is removed. Top up the cooling system afterwards and check for air pockets.
Preventing P1C99 on the Nissan Murano
After any fuel system repair on the Nissan Murano, always perform a fuel-trim reset and adaptation drive. Skipping this step leaves the ECU operating on pre-repair learned values, which can generate false P1C99 alerts for weeks after the fix.
Frequently Asked Questions — Nissan Murano P1C99
A: Yes. Any stored fault code — including P1C99 — will cause an automatic failure in most OBD-II based emissions tests. The code must be resolved and the vehicle must complete a full OBD drive cycle with no new codes before the test.