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Idle and throttle

P1639 Accelerator pedal sensors 1 and 2 don't agree

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P1639 means: Accelerator pedal sensors 1 and 2 don't agree. There are usually two throttle or accelerator pedal position sensors and they must agree. Drive gently and have the car checked soon. The most common repair costs about €90–180 in Estonia, depending on make and model.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.
Throttle body clean or replace€90–180parts and labour in Estonia, depending on make and model

What it means

There are usually two throttle or accelerator pedal position sensors and they must agree. The computer found a wrong signal or the two don't match.

This is a make-specific code (VAG). The exact meaning can vary by model and year. On other makes the same code means: Ford: Vehicle ID block corrupt or not programmed.

What you may notice

  • Engine light on
  • Limp mode with no power
  • Throttle response is delayed
  • Idle hunts

What could be wrong

  1. 1Dirty throttle body or worn sensor · Throttle body clean or replace €90–180
  2. 2Worn accelerator pedal sensor · Accelerator pedal sensor replacement €120–240
  3. 3Corroded connector · Wiring or connector repair €45–90
  4. 4Broken wire · Wiring or connector repair €45–90

Repair difficulty: Moderate

What you can check yourself

Check the throttle body and pedal connectors. Cleaning the throttle body often helps. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We read the sensor on the diagnostic tool and compare it with other sensors
  2. We check the connector, supply and ground
  3. We repair the wiring or replace the sensor or throttle body

Standard SAE description: Accelerator Position Sensor 1/2 Range/Performance

This code usually comes with: Check engine lightSee what the light means →

Related symptoms: Loss of power or limp mode

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

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Questions

What does fault code P1639 mean?

Accelerator pedal sensors 1 and 2 don't agree. There are usually two throttle or accelerator pedal position sensors and they must agree. The computer found a wrong signal or the two don't match.

Can I drive with code P1639?

Drive gently and have the car checked soon.

How much does it cost to fix P1639?

It depends on the cause: throttle body clean or replace €90–180; accelerator pedal sensor replacement €120–240; wiring or connector repair €45–90. Prices include labour at €45/h, depending on make and model.

How is P1639 fixed?

We read the sensor on the diagnostic tool and compare it with other sensors. We check the connector, supply and ground. We repair the wiring or replace the sensor or throttle body.

Related codes

P2112Throttle actuator: stuck closedP2113Accelerator pedal position sensor: reading or operation not right ("B")P2114Accelerator pedal position sensor: reading or operation not right ("C")P0124Throttle position sensor: signal drops out at times ("A")P0224Throttle/pedal position sensor: signal drops out at times ("B")P0225Throttle/pedal position sensor: circuit fault ("C")P1630Accelerator pedal sensor 1: signal too lowP1633Accelerator pedal sensor 2: signal too low

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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