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6.0
fairly significant- Typical Repair Cost:
- $260
- Average Mileage:
- 185,350 miles
- Total Complaints:
- 3 complaints
Most Common Solutions:
- change switch and o-ring on charcoal canister (1 reports)
- not sure (1 reports)
- replace vapor canister (1 reports)
exhaust system problem
Helpful websites
- No one has added a helpful site for this 2001 4Runner problem yet. Be the first!
A D V E R T I S E M E N T S
The maintenance light and VSC light turned on during my commute. P0440 was the code I read when I plugged in my scan tool.
I started by looking at the hoses connecting the vapor canister to the gas tank and did not see any issues there. Taking out the canister for testing was pretty straightforward, but a few of the hoses were really stuck on there. Once the 5 hoses and the connector to the VSV are taken off, there are only 4 screws holding it in place. On the bench, I was able to check the functionality of the VSV for EVAP using a 9V battery. The valve functioned properly, and air did not escape per the service manual, so that was not the culprit. Next up was the canister itself. There was no obvious damage to the outside, so it was time to check the air flow.
In the service manual, sections EC-9 and 10 were needed to fully debug the issue. While the EVAP port was functioning properly, I was not able to get the purge port to hold a 1.01 inHg of vacuum when the air inlet port was closed. With all of the other tests passing and this one failing, I was pretty confident that I found the root cause. To be safe, I went through the remaining tests, which has you check the VSV for pressure switching valve, and VSV for canister closed valve - both of which functioned correctly.
I went back and forth on getting a used or a new canister since they are fairly expensive, but decided on going new just for the piece of mind. The new canister comes with a new set of hoses, new VSV for EVAP, and even a new connector and harness for the VSV. Once I received the part, I went ahead and checked the purge port for pressure, and it held without issue!
The EVAP readiness test passed after running the drive cycle, and I was able to pass smog later that week.
- Drew D., Campbell, CA, US