Free API
Help
2007 LEXUS GS 430
4.3L V8•RWD•AUTOMATIC•gas
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor478Torque2122Fluid8DTC1857Battery1Maintenance0Recalls0
P1115moderate severityPowertrain

Engine Coolant Temperature Sensor Circuit Malfunction

on 2007 Lexus GS 430 4.3L V8 · RWD

What this code means

The engine coolant temperature sensor circuit has failed or is out of range. The ECM cannot accurately read engine temperature for fuel and fan control.

Symptoms

  • Check engine light on
  • Hard cold starts
  • Cooling fan running abnormally

Common causes

  • Faulty ECT sensor
  • Damaged wiring or connector
  • Low coolant level
  • Faulty ECM

Diagnostic steps

  1. Check coolant level
  2. Read ECT sensor live data
  3. Test sensor resistance vs temperature
  4. Replace ECT sensor if out of spec
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2007 Lexus GS 430 repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Lexus GS 430 — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →