AutoCodes – Ford – P2135 2009 Ford Fusion

P2135 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation

Quick Answer

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor 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: P2135 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor 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 2,554

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P2135 2009 Ford Fusion Description

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor. Both signals, APP and APP2, have a positive slope (increasing angle, increasing voltage), but are offset and increase at different rates. The 2 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits the other input is used. There are 2 reference voltage circuits, 2 signal return circuits, and 2 signal circuits (a total of 6 circuits and pins) between the PCM and the APP sensor assembly. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software converts these degrees to counts, which is the input to the torque based strategy. The PCM flagged a concern indicating that throttle position voltage PIDs TP1 and TP2 disagree by more than a calibrated limit.

OBDII Code P2135 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation - AutoCodes.com — P2135 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation

What does this mean?

What are the Possible Causes of the DTC P2135 2009 Ford Fusion?

Faulty Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position (APP) Sensor harness is open or shorted
Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2135 2009 Ford Fusion?

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 P2135 2009 Ford Fusion 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.

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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 P2135 2009 Ford Fusion Code

1. What does the OBDII code P2135 mean on a 2009 Ford Fusion?

P2135 indicates a voltage correlation issue between the throttle position sensor (TPS) "A" and "B," meaning the sensors are providing inconsistent readings to the engine control module (ECM).

2. What are the common symptoms of a P2135 code in a 2009 Ford Fusion?

Symptoms may include reduced engine power (limp mode), hesitation during acceleration, stalling, rough idling, or the check engine light illuminating.

3. What causes the P2135 code on a 2009 Ford Fusion?

Common causes include a faulty throttle position sensor, damaged wiring or connectors, carbon buildup in the throttle body, or a malfunctioning accelerator pedal position sensor.

4. Can I drive my 2009 Ford Fusion with a P2135 code?

It's not recommended to drive with this code for extended periods as it can lead to reduced performance, sudden loss of power, or unsafe driving conditions.

5. How do I diagnose a P2135 code on a 2009 Ford Fusion?

Start by checking the wiring and connectors for damage or corrosion, inspect the throttle body for carbon buildup, and test the throttle position and accelerator pedal sensors for proper voltage and signal output.

6. How do I fix the P2135 code on a 2009 Ford Fusion?

Common fixes include cleaning or replacing the throttle body, repairing damaged wiring or connectors, or replacing the throttle position sensor or accelerator pedal sensor if faulty.

7. Is a throttle body cleaning enough to fix the P2135 code?

In some cases, cleaning the throttle body can resolve the issue if carbon buildup is causing the sensors to send incorrect signals. However, other components may still need inspection or replacement.

8. How much does it cost to repair a P2135 code on a 2009 Ford Fusion?

The cost can vary depending on the repair. Replacing the throttle position sensor or accelerator pedal sensor typically costs between $150 and $400, including parts and labor.

9. What tools are needed to diagnose and repair the P2135 code on a 2009 Ford Fusion?

You may need an OBDII scanner, a multimeter to test voltage, basic hand tools, and throttle body cleaner if cleaning is required.

10. Can a software update fix the P2135 code on a 2009 Ford Fusion?

In rare cases, a reprogramming or update of the ECM may resolve the issue if itâ€™s related to incorrect sensor interpretation. This should only be done after ruling out hardware issues.