P1400 Lexus Code - Sub-Throttle Position Sensor Circuit Fault
Quick Answer
P1400 Lexus indicates Sub-Throttle Position Sensor Circuit Fault. Common causes include Faulty Sub-Throttle Position Sensor, Sub-Throttle Position Sensor harness is open or shorted, Sub-Throttle Position Sensor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1400 Lexus indicates Sub-Throttle Position Sensor Circuit Fault.
- Common causes
- Common causes include Faulty Sub-Throttle Position Sensor, Sub-Throttle Position Sensor harness is open or shorted, Sub-Throttle Position Sensor circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P1400 Lexus Description
What are the Possible Causes of the DTC P1400 Lexus?
- Faulty Sub-Throttle Position Sensor
- Sub-Throttle Position Sensor harness is open or shorted
- Sub-Throttle Position Sensor circuit poor electrical connection
How to Fix the DTC P1400 Lexus?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1400 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1400 Lexus code?
Need more information on how to fix the P1400 Lexus code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1400 Lexus code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1400 Lexus Code
What does the OBDII code P1400 mean on a Lexus?
P1400 indicates a fault in the sub-throttle position sensor circuit, which monitors the position of the sub-throttle valve to ensure proper engine performance.
What are the common symptoms of code P1400 in a Lexus?
Symptoms may include poor acceleration, reduced fuel efficiency, rough idling, and an illuminated check engine light.
What causes the P1400 code to appear on a Lexus?
Common causes include a faulty sub-throttle position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).
Can I drive my Lexus with the P1400 code active?
While the car may still be drivable, it’s not recommended as it can lead to reduced performance, increased fuel consumption, and potential engine damage if left unresolved.
How do I diagnose the P1400 code on my Lexus?
Start by inspecting the sub-throttle position sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to test the sensor’s voltage and resistance.
How do I fix the P1400 code on a Lexus?
Repairs may involve replacing the sub-throttle position sensor, repairing damaged wiring, or reprogramming the ECM if necessary.
How much does it cost to fix the P1400 code on a Lexus?
The cost varies but typically ranges from $150 to $300 for parts and labor, depending on whether the sensor or wiring needs to be replaced.
Will clearing the P1400 code solve the problem?
Clearing the code may temporarily turn off the check engine light, but the issue will reoccur unless the underlying problem is fixed.
Can a dirty throttle body cause the P1400 code on a Lexus?
A dirty throttle body is unlikely to directly cause the P1400 code, but it can contribute to related performance issues. Cleaning it may help improve overall functionality.
Does the P1400 code affect emissions?
Yes, a malfunctioning sub-throttle position sensor can impact air-fuel mixture and emissions, potentially causing the vehicle to fail an emissions test.
Discuss the causes and fixes for P1400 Lexus OBDII Code
Code P1400 Lexus comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
