AutoCodes – Isuzu – P1271 Isuzu

P1271 Isuzu Code - Accelerator Pedal Position Sensor 1-2 Correlation

Quick Answer

The Accelerator Pedal Position (APP) sensors are located within the Throttle Actuator Control (TAC) module assembly. Common causes include Faulty Accelerator Pedal Position (APP), Accelerator Pedal Position harness is open or shorted, Accelerator Pedal Position circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1271 Isuzu indicates Accelerator Pedal Position Sensor 1-2 Correlation.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP), Accelerator Pedal Position harness is open or shorted, Accelerator Pedal Position circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,664

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1271 Isuzu Description

The Accelerator Pedal Position (APP) sensors are located within the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted to the accelerator pedal bracket. There are 3 individual APP sensors within the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used in order to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is depressed.

OBDII Code P1271 Isuzu - Accelerator Pedal Position Sensor 1-2 Correlation - AutoCodes.com — P1271 Isuzu Code - Accelerator Pedal Position Sensor 1-2 Correlation

What does this mean?

What are the Possible Causes of the DTC P1271 Isuzu?

Faulty Accelerator Pedal Position (APP)
Accelerator Pedal Position harness is open or shorted
Accelerator Pedal Position circuit poor electrical connection

How to Fix the DTC P1271 Isuzu?

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 P1271 Isuzu 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 P1271 Isuzu code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1271 Isuzu Code

1. What does the OBDII code P1271 mean for an Isuzu vehicle?

P1271 indicates a correlation issue between the Accelerator Pedal Position (APP) Sensor 1 and Sensor 2, meaning the signals they provide to the engine control module (ECM) don't match as expected.

2. What are the common symptoms of code P1271 in an Isuzu?

Symptoms may include reduced engine power (limp mode), inconsistent throttle response, an illuminated check engine light, or difficulty accelerating.

3. What causes the P1271 code to appear in an Isuzu?

Common causes include a faulty APP sensor, wiring or connector issues, electrical short circuits, or a malfunctioning ECM.

4. Can a dirty throttle body cause the P1271 code in an Isuzu?

While a dirty throttle body may not directly cause P1271, it can lead to irregular throttle responses that may contribute to sensor misalignment.

5. How can I fix the P1271 code on my Isuzu?

Inspect and replace the APP sensor if faulty, check and repair damaged wiring or connectors, and ensure the ECM is functioning correctly. Calibration of the sensors may also be necessary.

6. Can I drive my Isuzu with the P1271 code?

Driving with a P1271 code is not recommended, as it may trigger limp mode and result in reduced power, which could be dangerous in certain driving conditions.

7. How do I test the Accelerator Pedal Position Sensor in an Isuzu?

Using a multimeter, check the voltage outputs of both APP sensors as you press the accelerator. Ensure the readings are smooth and consistent, with no sudden drops or spikes.

8. Is replacing the APP sensor the only solution for the P1271 code?

No, other solutions include checking for damaged wiring, cleaning connectors, and updating or reprogramming the ECM if necessary.

9. How much does it cost to repair the P1271 code on an Isuzu?

Repair costs vary but typically range from $100 to $300 for sensor replacement, depending on labor rates and parts.

10. Can a weak battery trigger the P1271 code in an Isuzu?

A weak battery can cause voltage fluctuations, potentially affecting sensor readings and triggering the P1271 code. Ensure your battery is in good condition.