P2135 Pontiac 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 Pontiac 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 Pontiac 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 Pontiac?
- 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 Pontiac?
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 Pontiac 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 P2135 Pontiac code?
Need more information on how to fix the P2135 Pontiac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2135 Pontiac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2135 Pontiac Code
1. What does the OBDII code P2135 mean on a Pontiac?
The P2135 code indicates a voltage correlation issue between the Throttle Position Sensor (TPS) "A" and "B," meaning their readings don't match as expected.
2. What are the common symptoms of P2135 on a Pontiac?
Symptoms may include reduced engine power (limp mode), hesitation during acceleration, rough idling, or an illuminated check engine light.
3. What causes the P2135 code to appear on a Pontiac?
Common causes include faulty throttle position sensors, damaged wiring or connectors, a malfunctioning throttle body, or issues with the engine control module (ECM).
4. Can I drive my Pontiac with the P2135 code?
Driving with this code is not recommended as it can cause reduced power and unsafe driving conditions. Address the issue as soon as possible.
5. How do I diagnose the P2135 code on a Pontiac?
Start by inspecting the throttle body, TPS connectors, and wiring for damage or corrosion, then use a scan tool to monitor TPS voltage readings.
6. How can I fix the P2135 code on my Pontiac?
Repairs may include cleaning or replacing the throttle body, repairing damaged wiring, replacing the TPS, or reprogramming the ECM if necessary.
7. Is the throttle body always the issue with code P2135?
Not always. Although the throttle body is a common cause, it’s important to check for wiring issues, sensor faults, or ECM problems as well.
8. How much does it cost to fix the P2135 code on a Pontiac?
Repair costs can range from $100 to $500 or more, depending on whether you need a throttle body replacement, wiring repairs, or ECM reprogramming.
9. Can cleaning the throttle body fix the P2135 code?
In some cases, cleaning a dirty throttle body can resolve the issue, but it depends on whether dirt or carbon buildup is causing the problem.
10. Do I need to replace both TPS sensors if I get a P2135 code?
Not necessarily. It’s best to diagnose which sensor is faulty or if the issue lies elsewhere, such as in the wiring or throttle body.
Discuss the causes and fixes for P2135 Pontiac OBDII Code
Code P2135 Pontiac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
