Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Nissan-Datsun Van XE, StandardFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System Description
- Diagnostic Modes
- Dual Led System (5 Modes)
- Entering Self-Diagnostics
- Retrieving Codes
- Trouble Code Identification Chart
- Clearing Codes
- Ecu Locations Table
- Summary
- Code Charts
- Notes
- Final Steps For All Code Charts
- Code 11: Crank Angle Sensor
- Code 12: Mass Airflow Sensor
- Code 13: Engine Coolant Temperature Sensor
- Code 14: Vehicle Speed Sensor
- Code 21: No Ignition Reference
- Code 31: Engine Control Unit (Ecu)
- Code 32: EGR Sensor (CALIF.)
- Code 33: Oxygen Sensor
- Code 35: EGR Temp. Sensor (CALIF.)
- Code 43: Throttle Position Sensor
- Code 45: Injection Leak
- Code 51: Injector Circuit
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.