Audi A4 no power when accelerating

What is the reason for the lag during acceleration?
Is there a jerk a few seconds after the accelerator pedal is depressed and the car jerks? Or at the moment of acceleration, the car cannot reach the desired speed?

Having detected such problems, you should not put off fixing them for later. Slumps when overtaking passing cars on the road, do not bode well. Having detected the first signs, you can try to diagnose the problem yourself, but it is better to contact the technical center. Experienced mechanics on modern equipment will quickly find and eliminate the cause of lagging during acceleration.

Sags during acceleration, can appear at different moments:
For a couple of seconds there is no reaction after the accelerator pedal is depressed.
For 4-10 seconds the engine rpm is lost and the car may stall.
The car moves for 1-2 seconds jerkily.
The engine decelerates and speeds up when the accelerator pedal is not engaged.

Common causes for failure to accelerate:

  • Worn spark plugs and high-voltage wires
  • Clogged fuel injectors
  • Clogged throttle valve
  • Clogged air filter
  • Gasoline pump malfunction

It is not uncommon for malfunctions to occur due to malfunctions in the fuel system. When accelerating, the system increases the amount of fuel supplied to the cylinders. The change in the proportions of fuel provokes sagging during acceleration. The throttle and fuel injectors should be inspected. When the choke or injectors are clogged, it can cause delayed auto response when accelerating.

Check the condition of the fuel, air and oil filters.
Filters can become clogged, resulting in poor performance and increased fuel consumption. They should be changed regularly.

Faults in the ignition system are also possible. Initially, it is necessary to take out and examine the plugs. Soot on the plugs, insufficient contact with the spark plug wires, or an overly rich or poor mixture, will cause the plugs to malfunction. High voltage wires can also cause motor and ignition coil failure. The high-voltage wires should not be damaged and should not spark when the engine is running.

To identify the exact cause of the failure to accelerate the car with an injector engine, requires special, diagnostic equipment. For this purpose it is better to contact us in car service in Moscow.

What recommends the manufacturer

  • Electronic diagnostics – connection of the diagnostic scanner for reading of errors in the data logger
  • If necessary, performing step-by-step troubleshooting based on the results of electronic diagnostics
  • Carrying out works on the basis of the data revealed by the diagnostics

On-board computer error codes for the symptom of lagging at acceleration in the Audi A4?

Error code: Decimal / HEX / OBD IIError description
16490
406A
P0106
Inlet pressure/air pressure=>G71/F96: Invalid signal
16491
406B
P0107
Intake pressure/air pressure=>G71/F96: Signal level too low
16492
406C
P0108
Intake pressure/air pressure=>G71/F96: Signal level too high
P0109Absolute manifold pressure sensor (MAP) / atmospheric pressure sensor – unreliable contact in an electrical circuit
16496
4070
P0112
Intake air temperature sensor-G42: Signal level too low
16497
4071
P0113
Intake air temperature sensor-G42: Signal level too high

16498

4072
P0114
Intake air temperature sensor-G42: No signal
16500
4074
P0116
Coolant temperature sensor-G62: Invalid signal
16501
4075
P0117
Coolant temperature sensor-G62: Signal level too low
16502
4076
P0118
Coolant temperature sensor-G62, signal level too high
P0119Coolant temperature sensor – unreliable contact in an electrical circuit
16506
407A
P0122
Throttle potentiometer-G69: Signal level too low

16507

407B
P0123
Throttle potentiometer-G69: Signal level too high

16514

4082
P0130
Row 1-probe 1: electrical circuit failure
16515
4083
P0131
Row 1-probe 1: electrical circuit failure
16516
4084
P0132
Row 1-Sonde 1: Voltage too low
16517
4085
P0133
Row 1-probe 1: reaction time is too long
16518
4086
P0134
Row 1-sonde 1: no activity

16520

4088
P0136
Row 1-probe 2: electrical circuit failure

16521

4089
P0137
Row 1-Sonde 2: Voltage too low

16522

408A
P0138
Row 1-probe 2: Voltage too high
16523
408B
P0139
Row 1-Sonde 2: Signal rate too low

16554

40AA
P0170
Row 1: Failure of the fuel-air mixture detection system
16555
40AB
P0171
Row 1, fuel-air mixture detection system: mixture too lean
16556
40AC
P0172
Row 1, fuel-air mixture detection system: mixture too rich

16557

40AD
P0173
Row 2: Failure of the fuel-air mixture detection system
16585
40C9
P0201
Cylinder nozzle 1-N30: electrical circuit failure

16586

40CA
P0202
Cylinder nozzle 2-N31: electrical circuit failure

16587

40КБ
P0203
Cylinder nozzle 3-N32: electrical circuit failure

16588

40CC
P0204
Cylinder nozzle 4-N33: electrical circuit failure

16606

40DE
P0222
Throttle angle sensor G188: Signal level too low

16607

40DF
P0223
Throttle angle sensor G188: Signal level too high
P0231Fuel pump relay – low voltage circuit
P0232Fuel pump relay – high voltage circuit
16645
4105
P0261
Cylinder nozzle 1-N30: short to ground
16646
4106
P0262
Cylinder nozzle 1-N30: short to plus
16648
4108
P0264
Cylinder nozzle 2-N31: short to ground

16649

4109
P0265
Cylinder nozzle 2-N31: short-circuit to plus
16651
410B
P0267
Cylinder nozzle 3-N32: short to ground

16652

410C
P0268
Cylinder nozzle 3-N32, short-circuit to plus

16654

410E
P0270
Cylinder nozzle 4-N33: short to ground

16655

410F
P0271
Cylinder nozzle 4-N33: short-circuit to plus

17641

44E9 /
P1233
Load accounting error
17643
44EB
P1235
Row 3, lambda correction after catalyst: control limit reached
17645
44ED
P1237
Cylinder nozzle 1-N30: open circuit
17701
4525
P1293
Electronic engine cooling control thermostat-F265, short-circuit to plus
17702
4526
P1294
Electronic engine cooling control thermostat-F265: short to ground
18436
4804
P2004
The inlet sliders of the 1st row of cylinders do not close
18440
4808
P2008
Inlet channel flaps: electrical circuit failure
P2100Throttle motor – open circuit
P2107Throttle control unit – processor error
P2108Throttle control unit – operation
P2119Throttle actuator, throttle valve – range/function
18554
487A
P2122
Accelerator pedal position sensor-G79: signal level too low

18555

487B
P2123
Accelerator pedal position sensor-G79: signal level too high
18559
487F
P2127
Accelerator pedal position sensor-G185: Signal level too low
18560
4880
P2128
Accelerator pedal position sensor-G185: Signal level too high
P2135Accelerator pedal position sensor / A/B switch – voltage correlation

18570

488A
P2138
Accelerator pedal position 1/2 sensors-G79+G185: Invalid signal
P2176Throttle control system – idle position adaptation not performed

18609

48B1
P2177
Row 1, fuel-air mix detection system: too lean mixture in the system at rpm above idle speed
18619
48BB
P2187
Row 1, fuel-air mixture detection system: too lean mixture in the system at idle speed
18620

P2188
Row 1, fuel-air mixture detection system: too rich mixture in the system at idle speed
18623
48BF
P2191
Row 1, fuel-air mixture detection system: too lean mixture in the system at full load
18625
48C1
P2193
Row 2, fuel-air mixture detection system: too lean mixture in the system at full load
18627
48C3
P2195
Lambda probe 1-row 1: too lean mixture signal

18628

48C4
P2196
Lambda probe 1-row 1: signal too rich mixture
18690
4902
P2258
Secondary air pump relay-J299: short-circuit to plus
P2263Charge pressure of turbocharger/driven supercharger – operation
P2265Fuel filter water sensor – range/function
P228CFuel pressure regulator 1, exceeding control limit – low fuel pressure
P228DFuel pressure regulator 1, exceeding control limit – high fuel pressure
P2280Tight/clogged intake system between air filter and air flow sensor
P2282Leaks between throttle body and intake valves
P2291Nozzle control pressure, starter cranking – pressure too low
18729
4929
P2297
Row 1, probe 1, lambda probe signal, voltage in forced idling mode: control limit exceeded
18732
492C
P2300
Control signal to ignition coil 1: short to ground
18735
492F
P2303
Control signal to ignition coil 2: short to ground

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