P0371 Code: Timing Reference High Resolution Signal (P0371)
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Was bedeutet das?
Code P0371 indicates a problem with the timing reference high resolution signal. This affects the PCM's ability to precisely time ignition and fuel injection.
Diagnostic system: Misfire and combustion
On a Lexus Nx, the P0371 code should be diagnosed as part of the misfire and combustion group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Lexus Nx
- Defekter Kurbelwellenpositionssensor
- Defekter Nockenwellenpositionssensor
- Gelängte Steuerkette oder verschlissener Zahnriemen
- Beschädigter oder gebrochener Kabelbaum
Zu beachtende Symptome
- Motorkontrollleuchte leuchtet
- Fehlzündungen oder Ruckeln des Motors
- Unruhiger oder instabiler Leerlauf
- Motor dreht, startet aber nicht
- Motor geht unerwartet aus
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- Check spark plugs, coils, injector balance, and compression before replacing expensive parts.
- Review freeze-frame RPM/load to see when the misfire occurs.
- Look for fuel trim or vacuum leak codes that can cause multiple-cylinder misfires.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
Wie man diagnostiziert
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Replacing ignition coils without moving coils, checking plugs, or confirming fuel and compression are healthy. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
CodePage.faq
Can I drive with the P0371 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0371 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0371 code, your Lexus will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0371?
Check spark plugs, coils, injector balance, and compression before replacing expensive parts. Review freeze-frame RPM/load to see when the misfire occurs. Look for fuel trim or vacuum leak codes that can cause multiple-cylinder misfires.
Join the Discussion
Reparaturkosten
Spark plug, coil swap test, or connector repair
Major component replacement after live data and circuit tests confirm failure
Beinhaltet Teile und Arbeit. Kann je nach Standort variieren.
Single-cylinder ignition fixes are often affordable; compression or timing problems require professional diagnosis.
DIY-Schwierigkeitsgrad
Can usually be performed at home with basic hand tools.