Mazda Error Code P1135: How to Fix It

Medium 1-2 hours High Severity Verified June 2026
Error Code
P1135
Brand
Mazda
Product Type
automotive
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P1135 in Mazda vehicles indicates a problem with the pedal position sensor switch A circuit, which monitors the accelerator pedal's position. This error can cause poor engine performance, reduced acceleration response, or even prevent the vehicle from starting properly.
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Tools You'll Need

How to Fix Error Code P1135

  1. Safety Preparation

    Never work under the hood while the engine is hot. Always disconnect the negative battery terminal when working on electrical components.
  2. Scan for Error Codes

  3. Locate the Pedal Position Sensor

  4. Inspect Wiring Connections

    Disconnect the negative battery terminal before handling any electrical connectors.
  5. Test Sensor Voltage

  6. Test Pedal Position Sensor Resistance

  7. Replace Faulty Components

    Use only OEM or equivalent quality replacement parts. Improper sensors can cause drivability issues.
  8. Clear Error Codes and Test

Parts You May Need

Pedal position sensor
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Electrical connector
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Wire repair kit
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OBD2 diagnostic scanner
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Pedal position sensor
Check Price on Amazon
Electrical connector
Check Price on Amazon
Wire repair kit
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Pedal position sensor
Check Price on Amazon
Electrical connector
Check Price on Amazon
Wire repair kit
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Pedal position sensor
Check Price on Amazon
Electrical connector
Check Price on Amazon
Wire repair kit
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Pedal position sensor
Check Price on Amazon
Electrical connector
Check Price on Amazon
Wire repair kit
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Pedal position sensor
Check Price on Amazon
Electrical connector
Check Price on Amazon
Wire repair kit
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
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When to Call a Professional

Call a professional mechanic if you're uncomfortable working with electrical systems, if multiple error codes are present indicating broader engine management issues, or if the problem persists after replacing the sensor. Complex wiring harness repairs or ECM programming may require dealer-level diagnostic equipment.

Frequently Asked Questions

Can I drive my Mazda with error code P1135?
You should avoid driving with P1135 as it affects throttle response and can cause unpredictable acceleration. The vehicle may enter limp mode, limiting power and potentially creating safety hazards.
How much does it cost to fix Mazda P1135 error?
DIY repair costs $50-150 for a new pedal position sensor. Professional repair typically ranges from $200-400 including parts and labor, depending on your local rates and specific Mazda model.
What causes the pedal position sensor to fail?
Common causes include wear from normal use, moisture infiltration causing corrosion, damaged wiring from rodents or wear, and electrical shorts. Heavy foot traffic on floor mats can also damage the sensor over time.
Will P1135 cause my Mazda to fail emissions testing?
Yes, P1135 will likely cause emissions test failure as it's an active diagnostic trouble code related to engine management. The error must be resolved and the vehicle driven through a complete drive cycle before testing.
How do I prevent P1135 from happening again?
Keep floor mats properly positioned to avoid interference with the pedal, avoid spilling liquids near the pedal area, and have regular maintenance to check electrical connections. Replace worn floor mats that may cause pedal binding.