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Hi I have a 2004 daf lf45 what voltage readings would i expect to find on the throttle pedal

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SOURCE: My son has a 2004 dodge ram 5.7 hemi.. has a voltage light on...and every time he pushes the brake pedal the throttle stop working.....

Explain voltage light on ? Do you mean battery symbol light , charging system ? Low voltage . Have charging system checked

Posted on Mar 27, 2016


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I have a daf LF45 2005 need to change fuel pump. does the engine have to be timed ,or can i just take it out

Makes no diff what the vehicle is, changing the fuel pump is not a part of any timing sequence unless it's the fuel injection pump on a diesel engine. Other than that, the fuel pump is actuated only by a bump/lobe on the cam. Nothing to time.

Jul 10, 2017 | DAF Cars & Trucks

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You need to understand the causes of this fault, it is not always the throttle pedal sensor, it can also be wiring or the throttle valve sensor. Read about it at the link. P2138 Throttle Pedal Pos Sensor Voltage Correlation DTC

Jun 20, 2017 | Cars & Trucks

1 Answer

My Jetta runs real good however the EPC lamp stays on and check engine lamp is on. I scaned and got Two codes.

The 102 code is a Mass Airflow sensor circuit code. It saus the voltage output was below expected.
the 322 is a crak sensor/RPM sensor code saying it didnt see it on at least 1 occaision when expected.

The crank sensor code can be accidentally triggered by long cranks, low battery, or stalls and there may be nothing wrong with the crank sensor.

The MAF sensor code can be caused by a defective MAF, a large air leak downstream of the MAF or in the PCV system causing the MAF to miss sensing too much of the air thats going in and therefore reading low voltage compared to RPM and Throttle position.

Any time the MAF is reading wrong, due to an airleak, timing issue, or defective MAF, an EPC lamp will follow. This just means that the accelerator pedal was in a certain position (wherever you pressed it) and the computer expects a certain MAF reading and a certain throttle reading and a certain RPM and LOAD reading all to match together. If any of them is too far off, you get an EPC light warning you the pedal didnt match something else that was expected.

If the crank code doesnt return after clearing, ignore it for now. The MAF code should be checked 1st with leak tests or smoke tests by a competent mechanic. If you SEE any loose, broken, or cracked hoses with a visual test; you can reattatch or repair those and hope for the best and it may be OK. If you dont see an obvious hose leak, you will likely need to replace something that is causing readings of 2 sensors to mismatch. COuld be the PCV/Oil seperator, throttle body, pedal sensor, or MAF. Guessing could get very expensive very quickly, so my recommendation is have a professional check it properly.

Nov 12, 2015 | Cars & Trucks

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2004 chevy can spark plugs cause scanner to read tps on a 6.0 l gas 2004 chevy silverado

It shouldn't. The TPS sensor is voltage based on throttle position. If the plugs are bad, you should get a separate cylinder misfire code only. If you are getting a TPS code, it is likely the TPS. Remember too, it is an electronic TPS, so there is a sensor on the accelerator pedal assembly that it talks to. Make sure that's plugged in. What you can do is with the vehicle in the on position (not running) - push the pedal all the way to the floor a few times. Also, clean out the throttle body and ensure there is no gunk preventing the throttle body from opening smoothly and all the way. Good Luck.

Feb 16, 2015 | 2004 Chevrolet Silverado

1 Answer

I have daf lf45 170 , the problem I have is with the electrics I've got side lights one side of the lorry but not the other the back light is also not working on the side I have no side lights ,...

Problem must be in wiring ahead of first lamp on the side not working. See if you can start at that lamp and work back towards lighting switch. Bet you will find a broken wire or back connection at a plug type connector.

Dec 18, 2014 | DAF Cars & Trucks

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I have low turbo pressure on a daf LF45/150 would any body know what may be causing this?

3 things can cause this.

1. The Turbo is shot and needs to be replaced.

2. You have a faulty waste gate.

3. You have bad exhaust leaks.

Nov 07, 2014 | Cars & Trucks

3 Answers

Error code p2138

Here is the definition. You may need to have someone check the accelerator pedal position sensor and the circuit.

P2138 NISSAN Description The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the Engine Control Module (ECM).
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.
Read more:

Sep 12, 2012 | 2010 Nissan Versa 1.8

1 Answer

Throttle pedal possition censor

its on the end of the throttle pedal ,

Jul 30, 2010 | 2004 Mitsubishi Lancer

1 Answer


The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage and emits the voltage signal to the ECM. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This one controls engine operation such as fuel cut, etc. The throttle position sensor unit has a built-in “wide open and closed throttle position switch,” which is not used to control the engine. For the G35, the throttle position sensor is part of the throttle control actuator.

Jun 08, 2010 | 2004 Infiniti G35 Sport Coupe

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