Trouble P2122 - Throttle Position Sensor D/Accelerator Pedal Position Sensor D - Input Low

What does error P2122 mean?

Trouble code P2122 is a general trouble code that indicates that the Engine Control Module (ECM) has detected that the throttle position sensor “D” or throttle position sensor “D” circuit voltage is too low (compared to the value specified in the manufacturer's specifications). accelerator pedals. This means that the voltage in the circuit is less than 0.17 volts. When this error occurs, the ECM may put the vehicle into limp mode, which in turn will force the engine to limit power, force the engine to idle, or stop the engine. This depends on the make and model of the car.

Symptoms of malfunction

The main driver symptom of P2122 is the MIL (Malfunction Indicator Light) illumination. It is also called Check engine or simply “check light”.

They can also appear as:

1. The “Check engine” warning light on the control panel will light up.
2. Unstable or low idle speed.
3. Increased engine speed at idle.
4. The engine stalls or has trouble starting.
5. The motor does not operate smoothly (pulsates).
6. There is no response to the gas pedal.

Other symptoms may also be present.

Causes of error P2122

The most common cause of P2122 is a faulty throttle position sensor D or accelerator pedal position sensor D. Other possible causes include a malfunctioning throttle actuator motor, a malfunctioning throttle position actuator, shorted or broken electrical wires, loose, corroded, or damaged electrical connectors, or a loose or damaged control module ground wire.

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How does a mechanic diagnose a P2122 code?

First, the mechanic will connect the OBD-II scanner to the vehicle's diagnostic port and read all the stored data and error codes. It should be noted that all present errors must be considered and eliminated in the order in which they are stored in the computer’s memory. He will then clear the error codes from the computer's memory and test drive the vehicle to see if the P2122 code appears again.

If the error code appears again, the mechanic will visually inspect the electrical wires and connectors related to the throttle actuator motor, throttle position sensor “D”, accelerator pedal position sensor “D”, and the CAN bus, and repair or replace all as necessary. shorted, broken, damaged or corroded components.

If the problem persists, the mechanic will measure the voltage in the throttle position sensor “D”, accelerator position sensor “D”, throttle actuator motor, and throttle position actuator circuits using a digital volt-ohmmeter and replace the faulty component if necessary. He will also check the control module ground wire to ensure it is properly connected and not damaged. If no problem is found, the mechanic will check and replace the engine control module (ECM) if necessary.

After all repairs have been completed, the mechanic will again clear any present fault codes from the computer's memory and test drive the vehicle to see if the P2122 code appears again. This will help determine if the problem is resolved.

On which cars is this problem most common?

The problem with code P2122 can occur on different machines, but there are always statistics on which brands this error occurs more often. Here is a list of some of them:

• Audi
• Chery (Chery Tiggo)
• Chevrolet (Chevrolet Aveo, Captiva, Cruz)
• Citroen
• Dodge (Dodge Ram)
• Ford (Ford Mondeo, Focus, C-Max)
• Geely (Gili Emgrand)
• Honda
• Hyundai (Hyundai Solaris)
• Infiniti
• Jeep
• Kia (Kia Sportage)
• Mazda (Mazda 3)
• Mercedes
• Mitsubishi (Mitsubishi Outlander)
• Nissan (Nissan Almera, Qashqai, Micra, Murano, Sunny, X-Trail)
• Opel
• Peugeot
• Saab
• Skoda
• Subaru
• Suzuki
• Toyota
• Volkswagen
• VAZ 2114
• Gazelle
• Lada Vesta, Granta, Kalina, Niva, Priora
• UAZ Patriot

With fault code P2122, you can sometimes encounter other errors. The most common ones are: P0335, P0343, P0522, P0607, P0642, P2106, P2110, P2121, P2127, P1229, P2138, P1260.

What repairs can fix error code P2122?

To resolve error P2122 you may need to:

• Replacing the throttle motor
• Replacing the throttle position actuator
• Replacing the throttle position sensor “D” or the accelerator pedal position sensor “D”
• Repairing or replacing electrical wires or connectors related to the throttle motor, sensors, or CAN bus
• Properly connecting or replacing the control module ground wire
• In rare cases, replacing the engine control module (ECM)

Diagnosis and problem solving

Carefully check the Throttle Position Sensor (TPS), wiring connector and wiring for opens, etc. Repair or replace as necessary to resolve P2122.

Check the voltage at the TPS (see your vehicle's service manual for more information). If the voltage is too low, this indicates a problem. Replace the sensor if necessary.

If recently replaced, the TPS may need to be adjusted. On some vehicles, installation instructions require proper alignment or alignment (see repair manual for details).

If there are no symptoms, the problem may be intermittent and cleaning the code may temporarily resolve it. In this case, you should definitely check the wiring to make sure that it is not rubbing, worn out, etc.

Decoding Niva fault codes

The presented errors are relevant for cars in modifications 21214, 2131, Urban and similar versions produced on a similar basis. Nivas are equipped with special indicators on the dashboard. In older generations, a light bulb is installed, the so-called Check. For new builds, it is important to use the BC display. Encrypted information has identical encoding.

Error 2

Excessive voltage in the on-board electrical circuit. Check the regulator on the generator.

Error number 8

Low voltage in the wiring circuits - the battery is discharged or there are other problems in the main electrical circuits.

Fault 10

The standard error reading system does not have this code. The symbol indicates the presence of two breakdowns at the same time, adding up to the number 10.

Code 12

A critical failure of the indicator on the instrument panel has been detected. Check the Check light line.

Fault 14

High signal level from DTOZH. The reason is overheating or damage to the sensor.

Code 21

The throttle position control system is damaged or not functioning correctly. Simple cleaning of the throttle and its adjustment can help.

Niva 21214: errors 3001 and 3004

It is recommended to check the line again. The system cannot correctly recognize the existing fault code.

Error P0030

The fuel control system is not functioning correctly. Diagnostics of the circuit and replacement of damaged elements is required.

Code 0036

Indicates improper operation of the DK1 heater. The system cannot respond in a timely manner to changes in the operating parameters of the internal combustion engine.

Error 0101

The signal from the mass air flow sensor is not received correctly. Check the sensor for damage and repair the problem. During self-diagnosis, the breakdown displays code 34.

Error P0102

The mass air flow sensor is completely faulty or there is no connection with it. Here the wiring is checked and only then the sensor.

Error P0112 VAZ 21214 Niva

The air temperature at the intake manifold is too low. This is where the controller or sensor may fail. The sensor is checked first.

Code 0115

Damage to the DTOZH - the power supply circuit is faulty. Check the wiring and terminals of the contact groups.

Malfunction P0130

The DK1 signal is outside the specified range. You will need to check the settings of the fuel mixture formation system and the sensor.

Code 0131

Lambda probe – voltage in the circuit is too low. The sensitive area of ​​the sensor may have worn out. You need to unscrew the sensor and visually check its integrity.

Fault 0134

DK1 – module stuck in one position. The sensor does not respond to changes in fuel mixture parameters. This may be due to carbon deposits formed on the working area of ​​the device.

Malfunction P0135

Failure in the DK1 heater circuit. Usually it does not have pronounced symptoms, but the check on the dashboard lights up.

0141 - Niva error

Indicates similar problems for DK2.

Malfunction P0171

The tightness of the intake tract is lost. Check hoses and connections for integrity and leaks.

Niva: error 0172

The mixture is too rich - problem P0172 indicates a clogged air filter or incorrect setting of the mixture converter.

Code P0300

The presence of multiple misfires without reference to a specific combustion chamber. The code appears in pairs with other ciphers.

Malfunction P0301

There are misfires in the first cylinder. Check the mixture ignition system for functionality. The cause is bad spark plugs or high-voltage wires.

P0302 - code

A similar problem for the second cylinder. The causes and methods of elimination are identical.

Fault 0303

The same goes for the third in order combustion chamber. You can also solve the problem.

P0304 - breakdown

There are misfires in the fourth cylinder. Troubleshooting involves diagnosing the fuel mixture ignition module.

Malfunction P0327

On 4x4 models it often appears. The reason is a low signal level from the knock sensor. Code 0327 can be resolved by checking the control module and wiring.

Error 0328

The code produces the opposite problem. Here the signal from the sensor is too high.

Code 0335

DPKV transmits incorrect data. Check the sensor and wiring for damage.

Niva: error P0340

The code indicates similar problems with DPRV. The causes and resolution of the breakdown will be identical.

Fault 0342

Camshaft position sensor - open circuit or critical wiring damage.

Error 0343

Damage to the sensitive area of ​​the phase distributor position sensor. The problem occurs on VAZ 2114/2115.

Malfunction P0441

Fuel vapor recovery system - incorrect air flow direction. Fully diagnosed and checked for problems.

Error P0422

The canister purge valve is faulty. Replace the part or clean it from carbon deposits.

Code 0444

An open circuit in the power supply of a similar valve.

Error 0500

The fault is in the vehicle speed sensor. The reason is a break in the control wiring line.

Niva: code P0504

Brake pedal sensor mismatch. Eliminated by replacing the damaged sensor or restoring the synchronization of the elements.

Code P0507

The system has detected that the idle speed is too high. Check the throttle and idle settings.

Fault 0560

Incorrect voltage in the on-board circuit. The reason is the regulator, battery charge and generator set.

Code P0830

A standard ECU failure that occurs if the clutch pedal sensor does not work correctly. Failure 0830 can be eliminated by diagnosing the circuit and replacing damaged elements.

Malfunction P1115

The oxygen sensor heater circuit is not operating properly. Check the line elements for oxides or breaks.

Code P1135

A similar problem for DK1.

Error P1140

Incorrect signal from the mass air flow sensor. Check the sensor and its control lines.

Malfunction P1141

Open air flow sensor control circuit.

Error P1513

Open circuit of the idle speed regulator with contact to ground. Check the wiring and correct the interruption.

Error 1514

An identical problem with the wire touching the positive wire of another device. It is easier to fix - the second element of the circuit will also not work correctly, which will make it easier to find insulation damage.

Fault 1570

Literally – the controller does not receive a signal from the APS unit. Check the cable and contact groups for damage and defects.

P1579 - malfunction

Emergency termination of throttle valve adaptation. Performed due to external influence/mechanical damage. Check the remote control for chips or damage to parts.

Malfunction P1602

A standard problem for domestic cars. The error indicates that there is no voltage in the on-board circuit, but the controller is working. Somewhere the negative has disappeared or the positive terminal on the main line has fallen off.

Niva: malfunction 2020

The intake manifold geometry change sensor is broken. Replace the sensor and diagnose the device.

Malfunction on Niva 21214 - P2122

The gas pedal position sensor shows an excessively low signal level. The reason is the sensor. Replace and everything will work.

Malfunction P2127

Breakage of the control line of the above sensor. The device should be checked and the wiring restored.

P2135 - Niva malfunction

TPS signals from sensors 1 and 2 do not match. Error 2135 system. The search should begin with the head control module.

P2138 - malfunction

The voltage in the TPS circuits is too low. The power line is damaged.

Fault 2187

Idle mixture too lean. The fuel pump may be worn out or air is being sucked into the system.

Code 2188

The opposite problem. The code indicates that the system is over-rich and the motor is flooded.

Phase sensor errors Niva 21214

Failures of DPRV types 0340, 341 and 342 occur due to sensor glitches. The motor may be unstable or may not start at all. If problems are detected, the entire module will need to be replaced - the sensor cannot be repaired.

Niva engine control module error codes

Most of the standard vehicle malfunctions are classified as ECU failure. To get a specific answer to what is wrong, you need to perform a more in-depth diagnosis of the car.

Niva knock sensor errors

Among the most common is code P0327, indicating that the sensor is not working properly. Replace the entire part if problems arise.

Niva: camshaft sensor errors

The problem is described above in the paragraph about the phase distributor.

Niva Urban: brake pedal errors

The most common code here is P0504 – sensor signal mismatch. In the event of such a breakdown, the entire module should be replaced or its wiring restored.

Error p2122 Priora 16 valves

On the Internet, this is what they write:
Diagnosis of error P2122 is described in the AVTOVAZ technological instructions ti.3100.25100.12056 sheets 258-259

Code P2122 is entered if: - the ignition is on; — the signal from the accelerator pedal position sensor A (ADC parameter “Accelerator pedal sensor voltage 1”) is less than 0.45 V for 0.2 s. The malfunction indicator lights up 5 s after the fault code appears.

Description of tests 1 Using the diagnostic tool, it is checked whether code P2122 is active at the time of diagnosis. 2 The controller is checked: contact “2” of the block to the DPPA should receive a reference voltage of 5 V from the controller. 3 The signal circuit is checked for an open or short to ground. 4 The controller is checked: when you bridge contacts “2” and “4” of the block to the DPPA using a probe, the DPPA A signal on the diagnostic device should change.

Diagnostic Information If a malfunction is detected in the DPPA A circuit, the engine management system will operate in limp mode for the remainder of the current trip. The following emergency modes are possible: - limiting engine power if the DPPA B circuit is operational; - idle speed if the DPPA A and DPPA B circuits are faulty. The diagnostic tool in the “Signal Monitoring” mode shows the signals from DPPA A (ADC parameter “Accelerator pedal sensor voltage 1”) and DPPA B (ADC parameter “Accelerator pedal sensor voltage 2”) in volts. The signals of DPPA A and DPPA B increase in proportion to the pressing of the accelerator pedal. At any position of the accelerator pedal, the signal DPPA A should be twice as large as the signal DPPA B. When the accelerator pedal is released, the signal DPPA A should be in the range of 0.50...0.85 V, the signal DPPA B should be in the range 0.25...0 .43 V.

Each time the ignition is turned on, the controller determines the zero position of the accelerator pedal. The value of 100% of the accelerator pedal (the “Accelerator pedal position” parameter) is achieved at a voltage of 3.50 V / 1.75 V from the DPPA A / DPPA B sensor. With the accelerator pedal fully depressed, the ADC parameter of the DPPA A signal should be in the range of 4.19 …4.59 V, the ADC parameter of the DPPA B signal should be in the range of 2.095…2.295 V.

Source

Errors during diagnostics

In order to accurately determine the cause of the error and methods for eliminating it, diagnostics are carried out. It can be done with the help of a car mechanic or yourself if you have the proper experience. An OBD-2 scanner is used for operation. Common errors that occur when diagnosing a P0122 code include:

• sensor “A”, which is responsible for the throttle valve, connector and electrical wires, is not inspected;
• the scanner is not checked, the code is not cleared from the computer memory, the system is not re-checked before repair;
• sensor “A”, responsible for the correct position of the throttle valve, is not inspected properly;
• The voltage of sensors “A” and “B”, responsible for the throttle valve, is not checked before and after repair work.

Description of the occurrence of error P2120 P2122 P2123 P2125 P2127 P2128 P2138

The APP sensor is installed on the accelerator pedal bracket and has 2 circuits: VPA (main) and VPA2 (auxiliary). The sensor is non-contact. In order to obtain accurate signals even under extreme driving conditions, such as very high and very low speeds, this sensor is designed using the Hall effect. The output voltage of the sensor supplied to the VPA and VPA2 contacts of the ECM varies in the range from 0 to 5 V in proportion to the angle of rotation of the accelerator pedal (throttle valve). The VPA circuit signal indicates the actual accelerator pedal angle (throttle angle) and is used to control the engine. The VPA2 circuit signal conveys the status of the VPA circuit and is used to test the APP sensor.

The ECM monitors the actual accelerator pedal angle (throttle valve angle) using signals VPA and VPA2, and controls the throttle valve based on these signals.