I was advised by a dealer that these codes were being caused by my position sensor- aka Throttle pedal so I ordered one and replaced it. No problem- however the codes showed up again within just a few miles. The symptoms other than the light are a slight jerkiness, especially when moving off from a standstill and sometimes when accelerating. Is there a secondary sensor in the chain which might be causing these errors? I do have a DAD on order but not here yet. (2004 T1N)
P0122 and P0135 codes
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abittenbinder
Doktor A (864-623-9110)
1222 and 1234 are the applicable MBenz codes related to Sprinter accel pedal position faults. There should have been a subfault reported for each which would further indicate if sensor is faulty or wiring to sensor is shorted to ground or shorted to +.
How did you generate the code numbers in your title?
Doktor A
I pulled the codes off of my Scan Guage. I had previously disconnected, lubed and reattached the two connectors on the pedal; no effect on the codes. I was assuming that there was a separate sensor someplace which was at fault although looking at the parts diagrams and reading the maintenance manual I couldn't find it. Are you thinking that the harness leading to the pedal is at fault? Is there a way to verify this using a DVM or similar?
abittenbinder
Doktor A (864-623-9110)
How was a dealer able to interpret your generic code numbers?
The DAD and the dealers DRBIII have a data stream function that can display the output of both accel pedal sensors. This can be very useful if you suspect one may be at fault or if a wiring issue may be present. Doktor A
Thanks for the help thus far. I didn't say anything to the dealer- just brought it in, described the driveability issues and pointed out that the light was on. I have found they prefer for their customers to be ignorant and so I give no indication I've ever worked on anything.
They said it was a the pedal travel sensor (5135510AA), which seemed reasonable given the symptoms and what scan gauge said and they gave me the exact part number- which is what I purchased and installed. Since my last message I've cleared codes twice and since the pedal replacement only the P01222 code reappears; the driveability symptoms remain the same.
Both dealers in my area are over an hour away and neither have been able to get reliably diagnose or fix Sprinter issues. If a DAD is needed to isolate I'll park the van until the DAD arrives or I can figure this out since it's near the end of the extended warranty and if it's a wiring issue that's out of my league but explicitly mentioned in the warranty. If there's a second sensor where is it? I was not able to ID on the parts PDF for a 2006 I got from a forum link- I'm more than willing to replace the other sensorif there's a chance it's the actual issue since I'm really hoping it's not the harness again (it was replaced once under warranty).
They said it was a the pedal travel sensor (5135510AA), which seemed reasonable given the symptoms and what scan gauge said and they gave me the exact part number- which is what I purchased and installed. Since my last message I've cleared codes twice and since the pedal replacement only the P01222 code reappears; the driveability symptoms remain the same.
Both dealers in my area are over an hour away and neither have been able to get reliably diagnose or fix Sprinter issues. If a DAD is needed to isolate I'll park the van until the DAD arrives or I can figure this out since it's near the end of the extended warranty and if it's a wiring issue that's out of my league but explicitly mentioned in the warranty. If there's a second sensor where is it? I was not able to ID on the parts PDF for a 2006 I got from a forum link- I'm more than willing to replace the other sensorif there's a chance it's the actual issue since I'm really hoping it's not the harness again (it was replaced once under warranty).
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abittenbinder
Doktor A (864-623-9110)
Both Hall Effect (on your '04) sensors are integrated in the accel pedal assembly. Doktor A