1.9 l SDI/TDI
AHF, AGR, ALH, AGP
Black smoke when accelerating.
Cause:
Vacuum hoses for exhaust gas recirculation, bent or not?
installed incorrectly.
1.9 L TDI
Engine codes: various.
The engine isn't responding to the accelerator.
Elevated idle speed, approximately 1,200 RPM.
Error code 18047: Throttle position sensor - implausible signal.
Cause:
Various process uncertainties during the assembly of cable connector connections.
Solution:
Turn off the air conditioning.
Read the error codes from the vehicle's memory using a V.A.G. Tester and document them.
In measurement block 002, specify the switching point of the vacuum contactor.
Check for less than 10%.
Pedal position sensor, resting position:
Gradually depress the accelerator pedal from its resting position, and then...
Keep an eye on the results in the tester. The vacuum switch is used in the...
The middle number is displayed in the third field from the left.
The throttle valve must be located below the 10% pedal position sensor.
Switch to setting 0 (the default switching point is approximately 4.5%).
up to 7.5%). The error only occurs when the switching point is greater than or equal to.
10% pedal position set.
Pedal position sensor at 100%:
Slowly release the accelerator pedal from full throttle and observe the indicator.
keep an eye on the tester, the vacuum switch must be at...
"The pedal position sensor should switch from 0 to 1 at the latest when the display changes from 0 to 1."
(usually around 1 to 3 percent).
o Connector and socket at the accelerator pedal module (pedal sensor G79 +).
G185) check.
Disconnect connector: Inspect the contacts and contact grid pattern within the connector housing, as well as the gold plating on the contacts.
Plug it back in.
Follow the same procedure for the 6-pin connector of the accelerator pedal module (T6a).
T15 a white connector, for the protective housing of control units.
Left engine compartment: Check if the connectors are properly locked in place.
are, and no contacts have been postponed.
Disconnect the connector: Inspect the contacts and contact grid within the connector housing, and check for gold plating (looking for bent or misaligned contacts).
Connectors.
Plug it back in.
Engine control unit connector: check for correct alignment or damage.
control.
Damaged or bent blade on engine control unit.
Check the plugs.
Translated on 03-07-2026, 15:19.
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