← View Generic P0123 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0123: Throttle Position Sensor Circuit High Input

on 2021 Honda PASSPORT

Fix Cost
$20 - $150
Parts & Labor
Difficulty
2/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0123 Mean on 2021 Honda PASSPORT?

The throttle position sensor is reading higher voltage than expected, indicating an open throttle when it may be closed.
⚠️

Symptoms

  • • High idle
  • • surging
  • • poor fuel economy
  • • engine racing
  • • difficulty controlling engine speed.
🔍

Common Causes

  • • Faulty throttle position sensor
  • • wiring short to power
  • • poor sensor connections
  • • throttle linkage problems.
🛠️

How to Fix P0123 on 2021 Honda PASSPORT

Replace throttle position sensor, repair wiring shorts to power, check throttle linkage, clean connections.

🔧

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Parts for 2021 Honda PASSPORT

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Related Diagnostic Codes

Other codes that may appear with P0123

P0120 Same System

Throttle Position Sensor Circuit Malfunction

Medium
P0121 Same System

Throttle Position Sensor Circuit Range/Performance Problem

Medium
P0122 Same System

Throttle Position Sensor Circuit Low Input

Medium
P0124 Same System

P0124: Fuel Pressure Regulator Circuit Malfunction

Medium
P0125 Same System

P0125: Fuel Pressure Regulator Circuit Malfunction

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system