P2135 Saturn Code - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation
Quick Answer
The throttle Position (TP) sensors 1 and 2 are potentiometer type sensors each with 3 circuits. Common causes include Faulty electric throttle control actuator (TP sensor 1 and 2), Throttle Position Sensor harness is open or shorted, Throttle Position Sensor circuit poor 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 Saturn indicates Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation.
- Common causes
- Common causes include Faulty electric throttle control actuator (TP sensor 1 and 2), Throttle Position Sensor harness is open or shorted, Throttle Position Sensor circuit poor 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 P2135 Saturn Description
- A 5 - volt reference circuit.
- A low reference circuit.
- A signal circuit
The TP sensors are used to determine the throttle plate angle for various engine management systems. The control module provides each TP sensor a 5-volt reference circuit and a low reference circuit. The TP sensors then provide the control module with signal voltage proportional to the throttle plate movement. Both TP sensors signal voltage are low at the close throttle and increase as the throttle opens. When the control module detects that the TP sensor 1 signal and TP sensor 2 signals disagree or the signal voltages are outside the predetermined range, the P2135 code is set.
What are the Possible Causes of the DTC P2135 Saturn?
- Faulty electric throttle control actuator (TP sensor 1 and 2)
- Throttle Position Sensor harness is open or shorted
- Throttle Position Sensor circuit poor connection
- Faulty accelerator pedal position sensor
How to Fix the DTC P2135 Saturn?
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 Saturn 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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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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