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2001 Nissan Skyline VQ25DD Engine Fault Codes P1232, P1110, and P1135 - Fuel Pressure & Intake Valve Timing Issues

Model: 2001 Nissan Skyline Fault Code: P1110 Posted: 2014-03-20 01:28

I own a 2001 Nissan Skyline with engine code VQ25(DD)2495. The vehicle is experiencing severe idle problems at a stop and has noticeably reduced power. I've identified fault codes P1232, P1110, and P1130. While I understand that P1232 relates to the fuel system, I'm unsure where to begin troubleshooting. Can anyone provide guidance on diagnosing these issues step-by-step? Specifically, how should I check fuel pressure and inspect the fuel pressure regulator? Additionally, what are the correct procedures for investigating intake valve timing circuit faults (P1110 and P1135), including wiring, connectors, and potential solenoid failures?

Related fault codes
P1110P1135P1232
Comments (3)
Anonymous 2014-03-20 08:01

Fault code P1232 indicates a fuel pressure regulator issue. Begin by checking the actual fuel pressure using a gauge; compare it to the manufacturer's specifications. Inspect the fuel pressure regulator for leaks, clogs, or signs of failure. Fault codes P1110 and P1135 point to intake valve timing solenoid circuit problems — one for Bank 1 and one for Bank 2. These solenoids are typically located near the throttle body or intake manifold. Since both faults likely didn't occur simultaneously, inspect all wiring harnesses, connectors, and terminals for open circuits, shorts, or corrosion. Ensure proper voltage supply to the solenoid circuits using a multimeter.

Anonymous 2014-03-21 01:17

Thanks for the detailed response! I'll start with checking fuel pressure today and then move on to inspecting the intake valve timing solenoid connectors and wiring.

Anonymous 2014-03-26 03:20

Hey, thanks for the help. I've thoroughly checked all connectors and wiring — no visible damage or shorts. Are there any specific relays I should test? Should I check voltage at the intake valve timing solenoid connectors when the engine is running or in idle mode? Any recommended diagnostic procedures or tools?