Faulty MAF Sensor, fault can't be erased.

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
Please provide as much description including adding photos directly to the topic or videos you have uploaded via youtube as possible.
Forum rules
One question per topic.
No Gearbox questions
Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
My Name: Lazar_Dunjic

Contributor
Posts: 24
Joined: Tue Mar 30, 2021 11:10 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 125000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 1 time
Been thanked: 1 time

Post

Hello people, does anyone know how to solve the problem, the diagnostics report the maf sensor, it has been replaced with a new one, but the error cannot be erased. The car jerks at low revs, is the ECU maybe in trouble
User avatar
My Name: C3driver52

Guru
Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 85 times
Been thanked: 65 times

Post

Lazar_Dunjic wrote: Sun Apr 11, 2021 6:58 pm Hello people, does anyone know how to solve the problem, the diagnostics report the maf sensor, it has been replaced with a new one, but the error cannot be erased. The car jerks at low revs, is the ECU maybe in trouble
Hello

Don't buy a new MAF on the back of a MAF code.

Firstly, disconnect the MAF and run the car to see if the performance improves.

If it improves with the MAF disconnected then you quite probably need to clean the MAF sensor, reconnect it and then try the run again.

If cleaning makes no improvement then replace the MAF.


If performance doesn't change with the MAF disconnected, don't replace it. You probably don't have a faulty MAF.

the diagnostics report the maf sensor,
The MAF has two sensors inside and each of those can fail in different ways, each with its own 'P' failure code.
Diagnostics should give you those codes and you can post them here. Without the codes, it is not possible to diagnose further than the steps I have listed above.


Depending on what you read the faults with, there may be more codes than just MAF codes that are stored and the tool you NEED to read them all is lexia/diagbox (topic here). Your fault may not be a MAF but EGR or Turbo electrovalve, and lexia/diagbox can read these codes.

You can't fix this fault by just changing parts on a whim.
User avatar
My Name: C3driver52

Guru
Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 85 times
Been thanked: 65 times

Post

Is this the car where you removed the intercooler and now have error codes?
My Name: Lazar_Dunjic

Contributor
Posts: 24
Joined: Tue Mar 30, 2021 11:10 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 125000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 1 time
Been thanked: 1 time

Post

yes, there is no intercooler, a new one has been ordered and I am waiting for it to arrive, but an error has occurred for the maf sensor and I cannot delete it
User avatar
My Name: C3driver52

Guru
Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 85 times
Been thanked: 65 times

Post

Please post the full MAF error code and if it is stored as permanent or temporary.

A screen shot of lexia is much easier than a lot of typing ;)
  • Similar Topics
    Replies
    Views
    Last post