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What is engine code p1120 dtc - Durango Dodge Cars & Trucks

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Thottle position sensor or its wiring, throttle position sensor is located on on throttle body where the air hose from air filter connects to. Thanks

Posted on Apr 07, 2011

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DTC P1120 - Boost Pressure / Throttle Position Sensor Malfunction
Hope this helps. God Bless

Posted on Apr 07, 2011


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Posted on Jan 02, 2017

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SOURCE: Ford Windstar 2003

Possible causes:

-- Frayed wires.

The code is faulty throttle position sensor. but here is some other reasons to get that code

-- Corrosion on TP sensor, PCM or harness connectors.

-- VREF harness opens or shorts.

-- Damaged TP sensor.

-- Damaged PCM.

God Bless Greg

Posted on Nov 25, 2008

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SOURCE: 98 lexus gs300 codes p1120 p1121

I wanted to start a thread specifically about failures within the throttle body concerning the GS300 (1998 in my case)

My symptons were:
VSC, VSC OFF, and ENGINE Lights would come on, followed by my car going into Limp Mode, where only that last 25% (if that) of the throttle would respond (basically have to floor the pedal to even move at all).

During the mornings, or when the engine was COLD, the throttle operated normal...then once the car warmed up, usually at about 10 mins, the problem would happened intermitantly at first...1 or 2 days over the course of a week, then it became more consitent, until last week it became a daily problem.

The first part I tried was the Throttle Position sensor, which is on the front side of the throttle body, and the easiest thing to replace...this didnt help at all. $300 part from Lexus, $80 part from (exacly same part toyota OEM)

"Idle Valve Motor", which is the larger electrical object next to the TPS on my 98 GS300. Problem is solved.

The Codes I got were P1120 and P1121 - Accelerator Sensor problem. However it wasnt really the Accelerator Sensor, it was indeed to actual electrical Motor that controls the opening of the Butterfly valve inside the Throttle body.

I found the problem by good old trouble shooting, and using an ohm meter to see if the throttle electric motor was getting elev, I found that the elec motor just to the left of the TPS was basically freaking out and shutting down. The Accelerator Pedal Sensor is on the Back-side of the throttle body where the throttle cable connects to, and has a spring on it. It was fine.

GS300's are indeed "drive by wire" concerning the throttle...the cable triggers the Accel Pedal Sensor, which sends a signal to the ECU, the ECU then sends power to the Idel Valve Elec Motor (next to the TPS), which opens and closes the mechanical butterfly valve, then the TPS sensor detects how far the elec motor is actually opening the butterfly valve...its a closed-loop feed-back system, meaning any failure in any sensor will cause the entire systm to fail.

The throttle cable apparently is ONLY there to allow the fail-safe of having that last 10-25% throttle when the electronic system fails...there is a gearbox inside the throtle body which allows the tail end of the throttle to manually engage the butterfly valve...the rest of the time, the butterfly valve is 100% opened and closed via the idle control motor.

Posted on Jul 08, 2009

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P0420 and P1120

make and model required here to look for help SORRY

Apr 06, 2015 | Cars & Trucks

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How do you repair

DTC P1744 means that the PCM has detected excessive slip in the TC. Refer to the section in the WSM (WorkShop Manual) that is applicable for your transmission for diagnosis.

Usually it means that the TC hasn't been getting enough hydraulic pressure in the TC apply circuit to lock it and it slips. When it slips, the clutch surface in the TC is usually ruined. You'll need to have the hydraulic concern repaired first, then replace the TC.

Frayed wires.
Corrosion on TP sensor, PCM or harness connectors.
VREF harness opens or shorts.
Damaged TP sensor.
Damaged PCM.

Diagnostic Trouble Code (DTC) P1120 indicates the TP signal is within the Self-Test range but below the closed throttle position range of 3.43% to 9.80% (0.17 to 0.49 volt).

Note: Throttle Position Sensor A (TP-A) is the same as Throttle Position (TP) Sensor.

Possible causes:
Perform a complete visual inspection of the harness connector at the TP sensor (including pins) for corrosion.
Perform a complete visual inspection of the harness wires between the TP sensor and the PCM for insulation fraying and corrosion.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 24, 2012 | 2001 Ford Escort ZX2

2 Answers

I have a 2000 focus with a p1120 code what can I do to start this repair.

Diagnostic Trouble Code (DTC) P1120 indicates that the Throttle Position Sensor (TPS) closed throttle position is below the range of 3.4 percent (0.17 volts). Possible causes for this DTC are:

· Damaged wiring harness or connectors

· Open or shorted Reference Voltage (VREF) circuit

· Faulty TPS

· Faulty Powertrain Control Module (PCM)

The methods/steps for diagnosing this code depend on how the code was stored and retrieved.

This code can be a Key On Engine Off (KOEO), Key On Engine Running (KOER), or a Continuous Memory code. To properly diagnose the cause of the problem a scanner must be obtained that has the ability to read each of these as well as the capability of reading live engine data from the PCM.

Direct voltage readings should be taken at the TPS connector and compared to the live data at the PCM. This will eliminate the possibility of a faulty PCM. The VREF and Signal Return circuits must be verified between the TPS and the PCM. Also the Sensor Ground circuit must be verified between the TPS connector and battery ground.

Feb 23, 2011 | 2000 Ford Focus

2 Answers

I have a 1996 Mercury Grand Marquis, that had the check engine light come on last night. I stopped, and had a auto store check for the code, and it showed a code of P1120. They could not tell me what this...

The code indicates P1120 TPS Out Of Range Low according to the ODB 2 chart. Get a Haynes or Chilton's manual to get instructions on how to make this repair.

Oct 09, 2010 | 1996 Mercury Grand Marquis

1 Answer

My 1999 vett got wet and stalled . When dried out started and it ran good for about 5 miles then engine service light and traction control light on dash went on, it also said reduced engine power. Checked...

Hello my name is Ben. Those are both throttle position sensor codes. Considering that you said it got wet, there may be some water hidden in the connectors of the Throttle Actuator Control module. There is an access panel in the passenger front wheel well. I would remove that panel and check the connectors on the module. They must be clean, dry and tight. While you are there examine all the wiring. Also, pull the passenger's side floor mat and feel for wetness, then check the passenger's fuse box behind that little piece of carpet for water infiltration. Hope this helps, Ben.

Aug 09, 2010 | 1999 Chevrolet Corvette

1 Answer

My 2000 ford focus se read p1120. already replaced the throttle position sencer but still shows p1120 code

does your engine idle fast or slow? You may need to clean the idle selonoid or the throttle body. They carbon up and stick.

May 22, 2010 | 2000 Ford Focus

1 Answer

Ford Windstar 2003

Possible causes:

-- Frayed wires.

The code is faulty throttle position sensor. but here is some other reasons to get that code

-- Corrosion on TP sensor, PCM or harness connectors.

-- VREF harness opens or shorts.

-- Damaged TP sensor.

-- Damaged PCM.

God Bless Greg

Oct 21, 2008 | 2003 Ford Windstar

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