(See page 2)
So my 2005 E320 CDI with 163,000mi is running funny, faltering, sputtering and every once in a while stalling when slowing or at idle, runs fine but weak acceleration on the freeway. It started with infrequent instances with NO Check Engine Light (CEL) on, but eventually CEL appeared and now it constantly runs poorly. The car starting going into "Limp Mode" with a rev limit of 3000, slow pick-up, etc.
Sounded similar to Mass Airflow Sensor issues I've read about here, so I bought a Bosch replacement:
Auto Parts Warehouse
Mass Air Flow Sensor Bosch Mass Air Flow Sensor E320|CDI Bosch
Price: $ 133.95
Qty: 1.00
Part #: W0133-1777981
The part looked the same, fit the same and seemed to be in new condition as expected. Wasn't hard to change and I was gentle. Replacement didn't change performance or remove CEL.
Then I got a Craftsman 87702 OBDII scanner, seems to work with the car as I found a few codes the first go at it.
Stored Codes:
P0069 - MAP - Barometric Pressure Correlation
P0087 - Fuel Rail System Pressure too low
P0193 - Fuel Rail Pressure Sensor High Input
P0653 - Sensor Reference Voltage B Circuit High
After clearing the codes and retest, I ended up with:
Mil DTC:
P0193 - Fuel Rail Pressure Sensor High Input
Stored Codes:
P0193 - Fuel Rail Pressure Sensor High Input
P0653 - Sensor Reference Voltage B circuit high
After checking these codes I purchased and installed:
Part:
Fuel Pressure Sensor
Desc:
Located on the fuel rail - This is a fuel pressure sensor for your Mercedes-Benz Diesel engine. This pressure sensor is located on the fuel rail.
Ships in 1-3 days - $166.87
Product Info:
Mfg Part# 0061536528
ECS Part# ES#1618729
Brand: Genuine Mercedes Benz
Home Page > ES#1618729 Fuel Pressure Sensor - Priced Each - 0061536528
This part supersedes the original part number, apparently there had been a few successions to this part, presumably due to reliability issues.
When this part showed up it was in a MBZ part box for a different part, box was opened... and this seems to have been a returned item that they sent me... so I'm not sure how to feel about whether or not I should get another one.
I installed this part on the front of the Fuel Rail, really simple, with Ignition off, I cracked a fuel line to see if the line was pressurized... it wasnt, so I worked out the old one and put the new one in... the new one has slight differences... but seemed ok, perhaps I felt it was a tiny tiny bit looser in the threads than the original, but it did fit, threaded in and does not leak fuel.
Once I started the engine, I cleared all codes to get rid of CEL... and the car ran as it used to, torquey and strong... for about five-ten minutes... I gave it some throttle and the power was definitely back... no more limp mode, got the tach over 3000 and all seemed well. Then I came to a stop light and the sputter (slight miss, hiccup, whatever) happened again at idle.
Even though CEL didn't come on, with my tester plugged in for the test drive, I erased code again, and the car did well again, and then fell back into it Limp Mode a short time after. Today I stalled at a light, and the car seems to go in and out of Limp Mode without pattern. Now CEL is back.
The only code now remains:
P0193 - Fuel Rail Pressure Sensor High Input
I think my next move is the rear pressure sensor, fuel filter, and perhaps fuel pump...
Q1) I can't find the rear sensor anywhere online easily, if anyone can point me to a link to find the rear fuel pressure sensor or P/N for the item that would be great.
Q2) What the heck could be going on?
Q3) Could something else have caused my new sensor to go bad after a few minutes of driving, since it was great the first 5 or 10 minutes of firm driving? Voltage/Short/etc in the electrical system... or...
Q4) Is the problem likely not the sensor or related electrical, but triggering this code? I hear the fuel pump may be related.
The symptoms of this issue aside from sputtering and stalling at idle, includes slight surging or surges, choppy response, wierd slow downs when rolled off throttle, etc.
I see three recall events on this car, but none appear to be related to this...but I could be wrong... I don't know if these have been done I'm not the original owner.
Any help greatly appreciated!
So my 2005 E320 CDI with 163,000mi is running funny, faltering, sputtering and every once in a while stalling when slowing or at idle, runs fine but weak acceleration on the freeway. It started with infrequent instances with NO Check Engine Light (CEL) on, but eventually CEL appeared and now it constantly runs poorly. The car starting going into "Limp Mode" with a rev limit of 3000, slow pick-up, etc.
Sounded similar to Mass Airflow Sensor issues I've read about here, so I bought a Bosch replacement:
Auto Parts Warehouse
Mass Air Flow Sensor Bosch Mass Air Flow Sensor E320|CDI Bosch
Price: $ 133.95
Qty: 1.00
Part #: W0133-1777981
The part looked the same, fit the same and seemed to be in new condition as expected. Wasn't hard to change and I was gentle. Replacement didn't change performance or remove CEL.
Then I got a Craftsman 87702 OBDII scanner, seems to work with the car as I found a few codes the first go at it.
Stored Codes:
P0069 - MAP - Barometric Pressure Correlation
P0087 - Fuel Rail System Pressure too low
P0193 - Fuel Rail Pressure Sensor High Input
P0653 - Sensor Reference Voltage B Circuit High
After clearing the codes and retest, I ended up with:
Mil DTC:
P0193 - Fuel Rail Pressure Sensor High Input
Stored Codes:
P0193 - Fuel Rail Pressure Sensor High Input
P0653 - Sensor Reference Voltage B circuit high
After checking these codes I purchased and installed:
Part:
Fuel Pressure Sensor
Desc:
Located on the fuel rail - This is a fuel pressure sensor for your Mercedes-Benz Diesel engine. This pressure sensor is located on the fuel rail.
Ships in 1-3 days - $166.87
Product Info:
Mfg Part# 0061536528
ECS Part# ES#1618729
Brand: Genuine Mercedes Benz
Home Page > ES#1618729 Fuel Pressure Sensor - Priced Each - 0061536528
This part supersedes the original part number, apparently there had been a few successions to this part, presumably due to reliability issues.
When this part showed up it was in a MBZ part box for a different part, box was opened... and this seems to have been a returned item that they sent me... so I'm not sure how to feel about whether or not I should get another one.
I installed this part on the front of the Fuel Rail, really simple, with Ignition off, I cracked a fuel line to see if the line was pressurized... it wasnt, so I worked out the old one and put the new one in... the new one has slight differences... but seemed ok, perhaps I felt it was a tiny tiny bit looser in the threads than the original, but it did fit, threaded in and does not leak fuel.
Once I started the engine, I cleared all codes to get rid of CEL... and the car ran as it used to, torquey and strong... for about five-ten minutes... I gave it some throttle and the power was definitely back... no more limp mode, got the tach over 3000 and all seemed well. Then I came to a stop light and the sputter (slight miss, hiccup, whatever) happened again at idle.
Even though CEL didn't come on, with my tester plugged in for the test drive, I erased code again, and the car did well again, and then fell back into it Limp Mode a short time after. Today I stalled at a light, and the car seems to go in and out of Limp Mode without pattern. Now CEL is back.
The only code now remains:
P0193 - Fuel Rail Pressure Sensor High Input
I think my next move is the rear pressure sensor, fuel filter, and perhaps fuel pump...
Q1) I can't find the rear sensor anywhere online easily, if anyone can point me to a link to find the rear fuel pressure sensor or P/N for the item that would be great.
Q2) What the heck could be going on?
Q3) Could something else have caused my new sensor to go bad after a few minutes of driving, since it was great the first 5 or 10 minutes of firm driving? Voltage/Short/etc in the electrical system... or...
Q4) Is the problem likely not the sensor or related electrical, but triggering this code? I hear the fuel pump may be related.
The symptoms of this issue aside from sputtering and stalling at idle, includes slight surging or surges, choppy response, wierd slow downs when rolled off throttle, etc.
I see three recall events on this car, but none appear to be related to this...but I could be wrong... I don't know if these have been done I'm not the original owner.
Any help greatly appreciated!