P2135 Saturn Code - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation
Quick Answer
The P2135 diagnostic trouble code for Saturn vehicles indicates a problem with the throttle/pedal position sensor or switch 'A'/'B' voltage correlation. Common causes include Worn throttle position sensor: Over time, the throttle position sensor can wear out and provide inaccurate voltage readings, Faulty accelerator pedal position sensor: A malfunction in the accelerator pedal position sensor can also trigger the P2135 code, Wiring issues: Damaged or corroded wiring connecting the sensors to the ECM can disrupt the voltage correlation and lead to this code. 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 Saturn indicates Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation.
- Common causes
- Common causes include Worn throttle position sensor: Over time, the throttle position sensor can wear out and provide inaccurate voltage readings, Faulty accelerator pedal position sensor: A malfunction in the accelerator pedal position sensor can also trigger the P2135 code, Wiring issues: Damaged or corroded wiring connecting the sensors to the ECM can disrupt the voltage correlation and lead to this code.
- 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 P2135 Saturn Description
The P2135 diagnostic trouble code for Saturn vehicles indicates a problem with the throttle/pedal position sensor or switch 'A'/'B' voltage correlation. This sensor is responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM) to adjust the air-fuel mixture and control the vehicle's acceleration. When the ECM detects a voltage correlation issue between sensor 'A' and sensor 'B', it triggers the P2135 code.
Common Causes of P2135 Saturn
- Worn throttle position sensor: Over time, the throttle position sensor can wear out and provide inaccurate voltage readings.
- Faulty accelerator pedal position sensor: A malfunction in the accelerator pedal position sensor can also trigger the P2135 code.
- Wiring issues: Damaged or corroded wiring connecting the sensors to the ECM can disrupt the voltage correlation and lead to this code.
- Contamination: Dirt, oil, or debris on the sensors can interfere with their operation and cause voltage discrepancies.
- ECM malfunction: In rare cases, a fault in the engine control module itself can be the cause of the P2135 code.
Symptoms of P2135 Saturn
- Reduced throttle response: The vehicle may exhibit a delay in throttle response or lack of acceleration when pressing the gas pedal.
- Engine hesitation: Hesitation or jerking during acceleration can be a common symptom of a faulty throttle/pedal position sensor.
- Stalling: The engine may stall or shut off unexpectedly, especially when coming to a stop or accelerating.
- Check Engine Light: The illumination of the Check Engine Light on the dashboard is a common symptom of the P2135 code.
How to Fix P2135 Saturn
- Diagnose the issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the throttle/pedal position sensors and wiring.
- Replace faulty sensors: If the sensors are found to be faulty, replace them with new, OEM-quality parts to ensure proper operation.
- Check wiring: Inspect the wiring harness for any damage or corrosion and repair or replace as needed.
- Clear codes: Clear the trouble codes from the ECM using the diagnostic scanner and perform a test drive to verify that the issue has been resolved.
- Reset adaptations: Some vehicles may require resetting the throttle adaptations in the ECM to ensure proper calibration of the new sensors.
Cost to Fix P2135 Saturn
The cost of repairing the P2135 code on a Saturn vehicle can vary depending on the extent of the issue and the specific parts needed for the repair. On average, the cost of replacing the throttle position sensor or accelerator pedal position sensor ranges from $100 to $200 each. Additionally, labor costs can add another $100 to $200, bringing the total repair cost to around $300 to $600. Keep in mind that these are rough estimates and actual costs may vary based on the vehicle's make and model, location, and the shop's labor rates. It's recommended to get quotes from multiple auto repair shops to compare prices and ensure a fair deal.
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Frequently Asked Questions about P2135 Saturn Code
1. What does the OBDII code P2135 mean on a Saturn?
P2135 indicates a voltage correlation issue between the Throttle Position Sensor (TPS) 'A' and 'B,' meaning the engine control module (ECM) detects inconsistent or out-of-range signals from the sensors.
2. What are the common symptoms of the P2135 code?
Symptoms may include reduced engine power (limp mode), poor throttle response, difficulty accelerating, stalling, or the check engine light turning on.
3. What causes the P2135 code on a Saturn?
Common causes include a faulty throttle position sensor, damaged wiring or connectors, a stuck throttle body, or issues with the ECM.
4. Can I drive my Saturn with the P2135 code?
It is not recommended to drive with this code active, as the reduced power mode can create unsafe driving conditions, and ignoring the issue could lead to further damage.
5. How do I fix the P2135 code?
Repairs may include cleaning the throttle body, replacing the throttle position sensor, repairing damaged wires or connectors, or reprogramming or replacing the ECM.
6. How much does it cost to fix the P2135 code on a Saturn?
Repair costs vary but typically range from $100 to $400, depending on whether the throttle body, sensors, or wiring need repair or replacement.
7. Can a dirty throttle body cause the P2135 code?
Yes, carbon buildup in the throttle body can cause improper sensor readings, leading to the P2135 code.
8. How is the P2135 code diagnosed?
A mechanic will use a scan tool to monitor TPS sensor readings, inspect the throttle body for buildup, and check the wiring and connectors for damage or loose connections.
9. Will disconnecting the battery clear the P2135 code?
Disconnecting the battery may temporarily clear the code, but it won't fix the underlying issue, and the code is likely to return.
10. How can I prevent the P2135 code from recurring?
Regular maintenance, such as cleaning the throttle body and inspecting wiring for damage, can help prevent this code from reoccurring.
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