P2138 Saturn Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The P2138 code for Saturn vehicles indicates a problem with the correlation between the accelerator pedal position sensor 1 and sensor 2. Common causes include Faulty accelerator pedal position sensors, Wiring or connector issues, ECM software glitches. 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 Saturn indicates Accelerator Pedal Position Sensor 1-2 Correlation.
- Common causes
- Common causes include Faulty accelerator pedal position sensors, Wiring or connector issues, ECM software glitches.
- 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 P2138 Saturn Description
The P2138 code for Saturn vehicles indicates a problem with the correlation between the accelerator pedal position sensor 1 and sensor 2. These sensors are responsible for monitoring the position of the accelerator pedal and sending this information to the engine control module (ECM). When these sensors do not align properly, it can lead to issues with the vehicle's performance, fuel efficiency, and overall drivability.
Common Causes of P2138 Saturn
- Faulty accelerator pedal position sensors
- Wiring or connector issues
- ECM software glitches
- Environmental factors such as moisture or corrosion
- Mechanical issues with the accelerator pedal assembly
Symptoms of P2138 Saturn
- Reduced engine power
- Acceleration hesitation or surging
- Difficulty maintaining speed
- Illuminated check engine light
- Reduced fuel efficiency
How to Fix P2138 Saturn
- Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific fault code and confirm the issue.
- Inspect the wiring and connectors associated with the accelerator pedal position sensors for any damage or corrosion. Repair or replace as necessary.
- Test the sensors using a multimeter to ensure they are functioning correctly. Replace any faulty sensors.
- Clear the fault code from the ECM's memory using the diagnostic scanner.
- Test drive the vehicle to verify that the issue has been resolved and that the sensors are now properly correlated.
Cost to Fix P2138 Saturn
The cost of repairing the accelerator pedal position sensor 1-2 correlation issue can vary depending on the extent of the problem and the specific components that need to be replaced. On average, this repair can range from $200 to $500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get an accurate estimate.
When is the Code Detected?
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Information for Specific Saturn Models
- P2138 2005 Saturn Ion — Accelerator Pedal Position Sensor 1-2 Correlation
Frequently Asked Questions about P2138 Saturn Code
What does OBDII code P2138 mean on a Saturn?
P2138 indicates an issue with the Accelerator Pedal Position Sensor (APP) 1-2 correlation, meaning the two sensors in the pedal assembly are reporting inconsistent signals to the engine control module (ECM).
What are the symptoms of code P2138 in a Saturn vehicle?
Common symptoms include reduced engine power (limp mode), hesitation or lack of acceleration, the check engine light illuminating, and potentially a throttle response delay.
What causes the P2138 code to appear on a Saturn?
The most common causes are a faulty accelerator pedal position sensor, damaged or corroded wiring/connectors, or issues with the ECM/PCM interpreting the signals from the sensors.
Can I drive my Saturn with a P2138 code?
Driving with a P2138 code is not recommended, as the vehicle may enter limp mode or experience unpredictable throttle response, which can be unsafe.
How do you fix a P2138 code on a Saturn?
Fixes may include replacing the accelerator pedal assembly, repairing or replacing damaged wiring/connectors, or reprogramming/updating the ECM if necessary.
How do I diagnose the P2138 code on my Saturn?
Start by checking the wiring and connectors around the accelerator pedal for damage or corrosion. Use a scan tool to monitor sensor readings and verify if the APP sensors are giving inconsistent signals.
Can a dirty throttle body cause the P2138 code on a Saturn?
While a dirty throttle body can cause acceleration issues, it is not a direct cause of the P2138 code, which specifically relates to APP sensor signal inconsistencies.
How much does it cost to fix a P2138 code on a Saturn?
Repair costs can vary but typically range from $150 to $300 for parts and labor, depending on whether the pedal assembly or wiring requires replacement.
Is a software update required to fix the P2138 code on a Saturn?
In some cases, a software update or reprogramming of the ECM/PCM may be necessary, especially if the issue persists after replacing hardware components.
What tools are needed to troubleshoot the P2138 code?
Basic tools include a scan tool or OBDII reader with live data capability, a multimeter to check wiring and voltage, and possibly a repair manual for wiring diagrams specific to your Saturn model.
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