C5 x7- Fuel rail pressure switch (Help !)

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sebahattin
Posts: 5
Joined: 07 Jun 2021, 08:29
x 1

C5 x7- Fuel rail pressure switch (Help !)

Post by sebahattin »

.
6 months ago, I changed the filters and engine oil. I don't remember the brand of the fuel filter, I'm guessing it's of medium quality. And there were 2 injector errors in the checks.But the performance was not bad.

After 1 month, there was a loss of power during driving, when checked, we found that 4 injectors also gave errors and renewed them. I drove smoothly for 2 weeks.

The car then slowed down, giving an error while driving. p 1621-control unit returned an error. I drove 2 months like this.

For the last 2 months-p 1621-control unit and p 0191 (fuel rail sensor-low pressure) -p 0193 (fuel rail sensor-high pressure) have been giving errors in order. On the instrument panel, the engine failure lamp-service lamp-ESP gives the error together.
I changed the brake pedal switch after researching from various forums, but it not disappeared.
Finally, I replaced the fuel filter with the original, but my problem not disappeared.

Do you think the ECU can also be a problem, or I should change the Fuel rail pressure sensor ?.
If you can help I'd appreciate it.

leithant
Posts: 80
Joined: 05 Jan 2006, 23:15
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by leithant »

I had the the pressure sensor give the same issue.

sebahattin
Posts: 5
Joined: 07 Jun 2021, 08:29
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by sebahattin »

leithant wrote:
08 Jun 2021, 12:04
I had the the pressure sensor give the same issue.
has sensor replacement solved your problem?

leithant
Posts: 80
Joined: 05 Jan 2006, 23:15
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by leithant »

Yes it did. Not that it guarantees yours is the same.

sebahattin
Posts: 5
Joined: 07 Jun 2021, 08:29
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by sebahattin »

leithant wrote:
08 Jun 2021, 14:18
Yes it did. Not that it guarantees yours is the same.
Has your ECU fault disappeared after that?

sebahattin
Posts: 5
Joined: 07 Jun 2021, 08:29
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by sebahattin »

Changed sensor. İt solved. Thx.

leithant
Posts: 80
Joined: 05 Jan 2006, 23:15
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by leithant »

Great! How much was the part for you?

sebahattin
Posts: 5
Joined: 07 Jun 2021, 08:29
x 1

Re: C5 x7- Fuel rail pressure switch (Help !)

Post by sebahattin »

İt was 50 usd.