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Fault code p0135, p0520
- Thread starter aka1004
- Start date
Motavar
New member
P0135: ECM
02 Sensor Heater shorted to battery +
Cause: damaged o2 sensor, damaged circuit wires, damaged connector or damaged ecm output pins.
Service Action:
Disconnect HEG0
Measure resistance between HEGO ping 1 and 3 (expected value = 14 to 15 ohms)
-----------------
P0135: ECM
O2 Sensor Heater open circuit or shorted to ground
Cause: blown fuse, damanged or disconnected O2 sensor,damaged or disconnected circuit wires, damaged ECM output pins.
Service Action:
Check Fuse F5
Disconnect HEG0
Mearsure voltage between hardness connector 8-HEG0-1 and ground (expected value = 11 to 13 volts)
Measure Resistance between HEG0 ping 1 and 3 (expected value = 14 to 15 ohms)
Disconnect ECM-B
Measure resistance between harness connector 8 - HEG0-3 and ground (expected value > 2 ohms).
Measure resistsance from harness connedtor: 8-HEG0-3 to 5-ECM-B5 (expected value : < 2 ohms).
------
P0520: ECM Engine Oil Pressure sensor circuit malfunction
Cause: damaged switch, damaged circuit wires, damaged connector, damaged ecm pins.
Service Action: Measure resistance between harness connector 6-E0P and ground. When engine stopped (expected value < 2 ohms).
Measure resistance between harness connector 6-E0P and ground. when engine running (expected value = open).
Measure resistance from harness connector: 6-E0P to 5-ECM-A10 (expected value: <2 ohms).
02 Sensor Heater shorted to battery +
Cause: damaged o2 sensor, damaged circuit wires, damaged connector or damaged ecm output pins.
Service Action:
Disconnect HEG0
Measure resistance between HEGO ping 1 and 3 (expected value = 14 to 15 ohms)
-----------------
P0135: ECM
O2 Sensor Heater open circuit or shorted to ground
Cause: blown fuse, damanged or disconnected O2 sensor,damaged or disconnected circuit wires, damaged ECM output pins.
Service Action:
Check Fuse F5
Disconnect HEG0
Mearsure voltage between hardness connector 8-HEG0-1 and ground (expected value = 11 to 13 volts)
Measure Resistance between HEG0 ping 1 and 3 (expected value = 14 to 15 ohms)
Disconnect ECM-B
Measure resistance between harness connector 8 - HEG0-3 and ground (expected value > 2 ohms).
Measure resistsance from harness connedtor: 8-HEG0-3 to 5-ECM-B5 (expected value : < 2 ohms).
------
P0520: ECM Engine Oil Pressure sensor circuit malfunction
Cause: damaged switch, damaged circuit wires, damaged connector, damaged ecm pins.
Service Action: Measure resistance between harness connector 6-E0P and ground. When engine stopped (expected value < 2 ohms).
Measure resistance between harness connector 6-E0P and ground. when engine running (expected value = open).
Measure resistance from harness connector: 6-E0P to 5-ECM-A10 (expected value: <2 ohms).
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fault code po520 - helllllllpppp 
HI everyone From NZ, and just picked up a mint '11 RS with just 3 thou on the clock. Great machine. Problem though - PO520 shows on the digital screen.. please check engine.
Taken it to Can Am mechanic who told me what the fault code was. Oil pressure is excellent.. at idle psi is 50, and at 5000rpm psi is 50, so well within ranges from what i understand.
Mechanic reckons this code PO520 is very rare and its already cost $300 , and getting absolutely nowhere. His one positive thought wads to run a new length of wire next the sensor wire and cut inot it and merge, so as to possibly bypass any wire damage. Next option he said was to get into the pcu etc - all with no real enthusiasm that he knows what he's doing.
Is it safe for me to run the bike with this fault code? When the bike first starts, the code comes up. TUrn it off and start again, the code disappears - this he thought was also very strange as he's not seen it before. Just bought the bike and it seems to have logged this fault now 88 times. Just had oil change and new filter last week. Thoughts????? Reading these posts, wow.. so much knowledge! They're fabulous bikes huh.. and I think I'm already converted from 2 wheels
HI everyone
From NZ, and just picked up a mint '11 RS with just 3 thou on the clock. Great machine. Problem though - PO520 shows on the digital screen.. please check engine.Taken it to Can Am mechanic who told me what the fault code was. Oil pressure is excellent.. at idle psi is 50, and at 5000rpm psi is 50, so well within ranges from what i understand.
Mechanic reckons this code PO520 is very rare and its already cost $300 , and getting absolutely nowhere. His one positive thought wads to run a new length of wire next the sensor wire and cut inot it and merge, so as to possibly bypass any wire damage. Next option he said was to get into the pcu etc - all with no real enthusiasm that he knows what he's doing.
Is it safe for me to run the bike with this fault code? When the bike first starts, the code comes up. TUrn it off and start again, the code disappears - this he thought was also very strange as he's not seen it before. Just bought the bike and it seems to have logged this fault now 88 times. Just had oil change and new filter last week. Thoughts????? Reading these posts, wow.. so much knowledge! They're fabulous bikes huh.. and I think I'm already converted from 2 wheels
BLUEKNIGHT911
Sadly Passed Oct 2024 - RIP
IS THIS CAUSING
:dontknow:......IMHO....Unless this is causing the dreaded " LIMP MODE "......I would monitor the oil and drive it.............The computers on the Spyders are way to sensitive and the systems are redundant also..............Hence if you are one teaspoon low on brake fluid it will throw a CODE but not effect the actual working of the Brakes.......Good Luck .....Mike :thumbup:
:dontknow:......IMHO....Unless this is causing the dreaded " LIMP MODE "......I would monitor the oil and drive it.............The computers on the Spyders are way to sensitive and the systems are redundant also..............Hence if you are one teaspoon low on brake fluid it will throw a CODE but not effect the actual working of the Brakes.......Good Luck .....Mike :thumbup:
Bob Denman
New member
:shocked: I'll respectivley disagree... a little bit! 
Before treating the codes lightly; determine what they are for... :yikes:
It's better to catch them in your own garage, than out along the roadside!
Before treating the codes lightly; determine what they are for... :yikes:
It's better to catch them in your own garage, than out along the roadside!
Gray Ghost
New member
From the service manual:
At idle (1400 RPM) Minimum is 10 psi, nominal is 22 psi, maximum is 44 psi
At 5000 RPM: Min 51 psi, nom 61 psi, 80 psi max.
Chupaca
New member
Oil issues...
I would check with another dealer. Oil pressure should not be constant. Oil level and condition is very important to these engines. How long since the last oil and filter change..?? Oil pressure sending units do go out though rare. When you shut off the engine and remove the key the computer resets and codes are stored. This is why the warning disappears. This should show up on the buds system used by dealers. Did they replace the sending unit..?? I would not do a lot of ryding without getting this fixed. Just seems like a stange approach from that dealer...jmo..:gaah:
I would check with another dealer. Oil pressure should not be constant. Oil level and condition is very important to these engines. How long since the last oil and filter change..?? Oil pressure sending units do go out though rare. When you shut off the engine and remove the key the computer resets and codes are stored. This is why the warning disappears. This should show up on the buds system used by dealers. Did they replace the sending unit..?? I would not do a lot of ryding without getting this fixed. Just seems like a stange approach from that dealer...jmo..:gaah:
HI everyone
Taken it to Can Am mechanic who told me what the fault code was. Oil pressure is excellent.. at idle psi is 50, and at 5000rpm psi is 50, so well within ranges from what i understand.
Mechanic reckons this code PO520 is very rare and its already cost $300 , and getting absolutely nowhere. His one positive thought wads to run a new length of wire next the sensor wire and cut inot it and merge, so as to possibly bypass any wire damage. Next option he said was to get into the pcu etc - all with no real enthusiasm that he knows what he's doing.
Is it safe for me to run the bike with this fault code? When the bike first starts, the code comes up. TUrn it off and start again, the code disappears - this he thought was also very strange as he's not seen it before. Just bought the bike and it seems to have logged this fault now 88 times. Just had oil change and new filter last week. Thoughts????? Reading these posts, wow.. so much knowledge! They're fabulous bikes huh.. and I think I'm already converted from 2 wheels
Last edited:
Chupaca
New member
Curious..!!
Seems you have issues with the O2 sensors. Have you done or had done any work on the exhaust system or catalytic coverter..?? This would be the place to start. Fuel controlers added to the system could affect the system...:dontknow:
Seems you have issues with the O2 sensors. Have you done or had done any work on the exhaust system or catalytic coverter..?? This would be the place to start. Fuel controlers added to the system could affect the system...:dontknow:
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