P2138 2012 Nissan Sentra Code - Accelerator Pedal Position Sensor Circuit Range/Performance
Quick Answer
The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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
- P2138 2012 Nissan Sentra indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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.
Code P2138 2012 Nissan Sentra Description
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.
What are the Possible Causes of the DTC P2138 2012 Nissan Sentra?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Crankshaft position sensor (POS)
- Refrigerant pressure sensor
- EVAP control system pressure sensor
How to Fix the DTC P2138 2012 Nissan Sentra?
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 P2138 2012 Nissan Sentra 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 P2138 2012 Nissan Sentra code?
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Frequently Asked Questions about P2138 2012 Nissan Sentra Code
What does the OBDII code P2138 mean on a 2012 Nissan Sentra?
The P2138 code indicates that there is a problem with the Accelerator Pedal Position (APP) Sensor Circuit Range/Performance. This means that the signal received by the engine control module (ECM) from the APP sensor is out of the expected range or is performing poorly.
What symptoms might I notice if my 2012 Nissan Sentra has the P2138 code?
Symptoms of the P2138 code can include poor engine response when pressing the accelerator, engine stalling or hesitating, the engine entering "limp-home" mode, and the Check Engine Light turning on.
What causes the P2138 code to appear on a 2012 Nissan Sentra?
The P2138 code can be triggered by several issues, including faulty accelerator pedal position sensors, poor electrical connections at the accelerator pedal position sensor, damaged wiring in the APP sensor circuit, or faults within the ECM itself.
How can I fix the P2138 code on my 2012 Nissan Sentra?
To fix the P2138 code, start by inspecting the accelerator pedal position sensor and its connections for any signs of damage or loose connections. Replace the sensor if it appears faulty. Check the wiring for any damage or shorts, and repair as necessary. If the wiring and sensor are in good condition, consider having the ECM checked and possibly reprogrammed or replaced by a professional.
Is it safe to drive my 2012 Nissan Sentra with the P2138 code?
While you can technically still drive your vehicle, it is not advisable to do so with the P2138 code active. The vehicle may experience reduced performance, unexpected stalling, or go into limp mode, which can compromise your safety and the safety of others on the road.
Can a faulty APP sensor on a 2012 Nissan Sentra affect fuel economy?
Yes, a faulty APP sensor can affect fuel economy. If the sensor is not accurately measuring the position of the accelerator pedal, it can lead to improper fuel delivery, which in turn can decrease the vehicle's fuel efficiency.
What tools are needed to diagnose the P2138 code on a 2012 Nissan Sentra?
To diagnose the P2138 code, you will need an OBD-II scanner to read the code and monitor live data. Additionally, a digital multimeter can be useful for checking the integrity of the sensor and wiring.
How much does it typically cost to repair the P2138 code in a 2012 Nissan Sentra?
The cost to repair the P2138 code can vary widely depending on the underlying cause. If the issue is simply a loose connection or minor wiring repair, costs may be low. However, if the accelerator pedal position sensor or the ECM needs replacement, the repair could be more expensive, potentially ranging from $150 to $600.
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