Manager Forum

Can' get rid of codes; truck hesitates at lights.

Has new fuel pump and fuel filter, 48psi at idle. Have smoke tested the vacuum system. Mass air flow passes test.

2.0L Engine, automatic 4x2; need some help here. 954-763-5506 Ralph!

Thanks for the help if you have the time.

Does this Rav have a year?

What are the fuel trims at idle? Then at 2000 rpm?

At Idle: St Ft1 -17.2%
Lt Ft1 -1.5%
St Ft2 0.7%
Lt Ft2 -20.2%

At 2000 RPM: St Ft1 -1.5%
Lt Ft1 -1.5%
St Ft2 -3.0%
Lt Ft2 -3.0%

At 3000RPM: St Ft1 2.3%
Lt Ft1 -0.7%
St Ft2 4.7%
Lt Ft2 -1.5%
*Note* Both One O2 Sensor At 3.0 Volts. Vehicle Has four O2 Sensors

just a quick look i found there are updated a/f ratio sensors. not for this specific code but on the other hand it does cover slow responses. did this person happen to fill the tank with "alternate fuel"?

Year Of truck 2001 2.0 L Vin H

Steve its a rare car or truck that stumps me. I'm of the opinion to replace both B1B2 sensors as may be this guy leaded them. They are very slow to respond to lean or rich driven commands as we have created the vacuum leaks and also enriched with propane. My tech is asking for an ECU, I don't think it will change much. The owner showed me history on the truck at 30K they replaced the ECU. It has 100K now? I just think it should have coded the ECU. Maybe this is it's way of saying it. I'm going to spring for the sensors first! I'll post later!

Stewart 954-763-5506

Double check the MAF sensor again. I've replaced lots of MAF sensors for this problem. Sometimes a cleaning will help. MAF is easy and cheap. See if your vendor will let you pop one in and try it. If not, then I agree with trying the A/F ratio sensors.

Thank You

Replaced the mass air flow meter and the truck is performing properly.

wow, a fix posted in a prudent manner. my day is starting on a good note. on a side note, i'm noticing more and more sensor failure because of low quality or inferior air filters. i'm seeing air filters that appear to be heavily oiled to add to particle capture. i'm wondering if it's helping coat the exposed portion of the sensor causing particle contamination. along with this i see build up of soot/dirt/crapola on the sides of the air inlet tube after the filter. i'm also seeing a lot of improperly installed filters and not shockingly seeing the lube stickers from two or three major chain "lube shacks".

Yes Steven I think you're right to some respect, but Toyota MAFs have a high failure rate - even with clean factory air filters. I think its a flaw in manufacturing or design.

Tech Tip Posted at Codes area? Yes