Difference between revisions of "16485/P0101/000257"
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* Mass Air Flow Sensor (G70) faulty | * Mass Air Flow Sensor (G70) faulty | ||
* Air Leak(s) after Mass Air Flow Sensor (G70) | * Air Leak(s) after Mass Air Flow Sensor (G70) | ||
| − | * Intake | + | * Excessive restrictions in the Intake/Exhaust System |
| + | ** Dirty air filter, clogged snow screen, clogged CAT | ||
* Ground Spots corroded or Paint Residue | * Ground Spots corroded or Paint Residue | ||
* Wiring and/or Connections from/to Mass Air Flow Sensor (G70) faulty | * Wiring and/or Connections from/to Mass Air Flow Sensor (G70) faulty | ||
| Line 24: | Line 25: | ||
==== Special Notes ==== | ==== Special Notes ==== | ||
| + | * When found in 2nd Gen 2.0T engines such as the CCTA make sure there are not any leaks in-between the MAF and the Turbocharger inlet. This type of problem will not cause a boost leak but can cause this Implausible Signal DTC. | ||
* In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. It's not a matter of defective or breaking down, but it is filthy / dirty (not easy to clean). You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm) | * In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. It's not a matter of defective or breaking down, but it is filthy / dirty (not easy to clean). You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm) | ||
| + | * It is not uncommon for a TDI to set Implausible Signal Mass Air Flow Sensor (G70) faults when the engine performance is reduced due to a mechanical problem. These mechanical problems may include, ''but are not limited to'': | ||
| + | ** Faulty electric fuel pump or Restricted fuel filter. See the [[Fuel Pump Basic Settings for PD, PPD, and CR TDI Engines]] page for Basic Settings tips after replacement. | ||
| + | ** Excessive restrictions in the intake/exhaust system | ||
| + | ** Internal camshaft/valve/lifter problems | ||
| + | |||
[[Category:Fault Codes]] | [[Category:Fault Codes]] | ||
Latest revision as of 10:34, 28 October 2020
16485/P0101/000257 - Mass Air Flow Sensor (G70): Implausible Signal
Possible Symptoms
- Loss of Power
- Erratic Idle
Possible Causes
- Mass Air Flow Sensor (G70) faulty
- Air Leak(s) after Mass Air Flow Sensor (G70)
- Excessive restrictions in the Intake/Exhaust System
- Dirty air filter, clogged snow screen, clogged CAT
- Ground Spots corroded or Paint Residue
- Wiring and/or Connections from/to Mass Air Flow Sensor (G70) faulty
Possible Solutions
- Check Intake Air Filter
- Check Mass Air Flow Sensor (G70)
- Check Ground Spots
- Check Wiring and/or Connections from/to Mass Air Flow Sensor (G70)
Special Notes
- When found in 2nd Gen 2.0T engines such as the CCTA make sure there are not any leaks in-between the MAF and the Turbocharger inlet. This type of problem will not cause a boost leak but can cause this Implausible Signal DTC.
- In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. It's not a matter of defective or breaking down, but it is filthy / dirty (not easy to clean). You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm)
- It is not uncommon for a TDI to set Implausible Signal Mass Air Flow Sensor (G70) faults when the engine performance is reduced due to a mechanical problem. These mechanical problems may include, but are not limited to:
- Faulty electric fuel pump or Restricted fuel filter. See the Fuel Pump Basic Settings for PD, PPD, and CR TDI Engines page for Basic Settings tips after replacement.
- Excessive restrictions in the intake/exhaust system
- Internal camshaft/valve/lifter problems