I thought I'd update this thread. Once again, life has gotten in the way and I wasn't able to dig much further into this fuel pump/gas gauge issue until very recently.
In regards to the fuel pump:
I took one of the old PPS units apart to verify the manufacturer of the pump motor itself. I had a feeling it wasn't a genuine Walbro unit, and sure enough it isn't. You can see in the pictures, but it's an unmarked Walbro GRJ235 knock off. I imagine the bearings are made of cheddar cheese or something similar. If anybody has an OEM Volvo pump they'd be willing to sell me, I'd love you forever.
- IMG-3164.jpg (442.09 KiB) Viewed 202 times
- IMG-3165.jpg (471.27 KiB) Viewed 202 times
- IMG-3166.jpg (378.23 KiB) Viewed 202 times
In regards to the gas gauge:
As was suggested above, I picked up a WiFi OBD2 reader and downloaded the 850 OBD2 app from the Google Play Store. I ran some tests and diagnostics, specifically on the COMBI. The gauge cluster test performed perfectly, but the COMBI had two stored DTCs: CI-113 and CI-114. I've pasted the log that the OBD2 app created below. Would these codes suggest that there's a wire going up to the gauge cluster that's disconnected or broken or something? Or is the ejector sender dead?
#VOLVO 850 OBD-II SUMMARY SECTION#
Your model here
1.6.5
Android SDK: 26 (8.0.0)
14-Jul-2023
Samsung SAMSUNG-SM-G935A 1080 x 1920
Installed: 1
Total mileage: 232 840mi
16 Hours of lost miles (per 600 mi)
Market Code: Unknown
SERVICE Light Calculation
3 840mi / 10 000mi
11.13 Months / 102.4 Months
146 Hours / 750 Hours
OBDII PIDs
ECU 1F has PIDs [01] supported
ECU 17 has PIDs [01] [03] [04] [05] [06] [07] [0C] [0D] [0E] [0F] [10] [11] [12] [13] [14] [15] [1C] [1D] [1E] [20] supported
[+ click to view more]
ECU:1F MIL:OFF DTC: 0 codes
Test Name Available Complete
Components: True True
Fuel System: False N/A
Misfire: False N/A
EGR system: False N/A
O2 Sensor HT: False N/A
O2 Sensor: False N/A
A/C Refrigerant: False N/A
Secondary Air..: False N/A
Evaporative Sys..: False N/A
Heated Catalyst: False N/A
Catalyst: False N/A
ECU:17 MIL:ON DTC: 1 codes
Test Name Available Complete
Components: True True
Fuel System: True True
Misfire: True True
EGR system: False N/A
O2 Sensor HT: True True
O2 Sensor: True False
A/C Refrigerant: False N/A
Secondary Air..: True False
Evaporative Sys..: True True
Heated Catalyst: False N/A
Catalyst: True False
[+ click to view more]
OBDII DTCs
[P0133]
ECU 51 (COMBI)
09459558 P/N Part Number
A H/W Rev.
09168133 Software
23 S/W Rev.
34 Wheel Circumference
COMBI has 2 DTC: 05 03
CI-114: Fuel Level sensor stuck
[+ click to view more]
CI-113: Fuel Level signal too High / Low Fuel / short to supply
[+ click to view more]
ECU: 01 No fault codes reported
ECC has 1 DTC: 37
ECC-414: (inlet)Fan motor passenger comp (interior) temp sensor, Faulty Signal
ECU: 2D No fault codes reported
ECU: 58 No fault codes reported
ECU: 6E No fault codes reported
ECU: 7A No fault codes reported
Power Seat Left has 1 DTC: 16
PS-422: Battery Voltage too low
#VOLVO 850 OBD-II SUMMARY SECTION - END#
#RENAME FILE TO PREVENT DELETING BY ACCIDENT##
#VOLVO 850 OBD-II LOG - SERVICE#
Your model here : 14-Jul-2023 : Wifi
ATPC >> ATPC
OK>
AT@1 >> AT@1
OBDII TO RS232 INTERPRETER>
AT@2 >> AT@2
?>
ATD >> ATD
OK>
AT Z >> AT Z
�
ELM327 V1.5>
ATL1 >> ATL1
OK>
ATE1 >> ATE1
OK>
ATS1 >> ATS1
OK>
ATL1 >> ATL1
OK>
ATS1 >> ATS1
OK>
ATSP 3 >> ATSP 3
OK>
ATH1 >> ATH1
OK>
ATAL >> ATAL
OK>
ATKW0 >> ATKW0
OK>
ATSR 13 >> ATSR 13
OK>
ATE0 >> ATE0
OK>
ATAT 0 >> OK>
ATST 2C >> OK>
ATKW >> 1:-- 2:-->
ATPC >> OK>
ATIIA 51 >> OK>
ATWM 82 51 13 A1 >> OK>
ATSI >> BUS INIT: ...OK>
ATSI >> BUS INIT: ...OK>
ATSI >> BUS INIT: ...OK>
ATKW >> 1:D3 2:B0>
ATSH 83 51 13 >> OK>
