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Problems/Service/RepairsIf you have a problem with your HHR, want a tip on repairing or performing a particular service to you HHR here is the place to post!
As long as there is a CEL The computers are running in open loop; which will reduce MPG and performance as well as mask some other codes. I suggest you take care of the codes first then worry about the chain. Ignoring the CEL is a very bad idea.
As long as there is a CEL The computers are running in open loop; which will reduce MPG and performance as well as mask some other codes. I suggest you take care of the codes first then worry about the chain. Ignoring the CEL is a very bad idea.
Is related to pre-heating on 02, if my memory serves me correctly, after it heats up it closes loop. I've literally driven the car over 100k with the codes, avg 30mpg many times. The evap code is another story.
Swapped everything out and shes running like a champ. Chain was stretched, lots of play, and front guide was loose. Shifts a whole lot better now too.
Run it into the ground if you want to. Those computers are just trying to take over, not help us. Kill Skynet.
Why not just buy a new sensor and borrow the tool? That is a lot cheaper than buying a new cat when it dies because you ignored the warnings.
Both codes might be as easy as a fuse; the heated O2 sensors are on fuse #33 same as the EVAP purge valve and MAF/IAT. The EVAP vent is on fuse #64.
Run it into the ground if you want to. Those computers are just trying to take over, not help us. Kill Skynet.
Why not just buy a new sensor and borrow the tool? That is a lot cheaper than buying a new cat when it dies because you ignored the warnings.
Both codes might be as easy as a fuse; the heated O2 sensors are on fuse #33 same as the EVAP purge valve and MAF/IAT. The EVAP vent is on fuse #64.
The issue is within the pcm (the grounding circuit for heater circuit b1s2). I've already diagnosed it and thrown plenty of parts at it, i even built an entire engine harness for it from scratch (for other issues). The secondary 02 sensor isn't even needed, it's strictly for emissions. In fact, I don't even think the Standalone ecotec setups even have it, could be wrong though. Still have original cat at 255k...
So, 1 transistor out of thousands up and burned out with for no reason. Internal computer faults cause codes. Did you check the wires for continuity?
BTW, the sensor does no use ground, it uses low ref. If the fault was in the ECM other circuits would have problems.
There are 3 different codes relating to the #2 O2 sensor heater, P0036 is the control circuit and P0054 is heater resistance. P0141 is either the heater is drawing too much or too little amps., less than .25 or more than 2.5 amps
The heater should be 1-2 amps resistance. It operates with PWM, so looking for ground in the controller is pretty much futile. The temperature is calculated using the resistance of the heater.
So, 1 transistor out of thousands up and burned out with for no reason. Internal computer faults cause codes. Did you check the wires for continuity?
BTW, the sensor does no use ground, it uses low ref. If the fault was in the ECM other circuits would have problems.
There are 3 different codes relating to the #2 O2 sensor heater, P0036 is the control circuit and P0054 is heater resistance. P0141 is either the heater is drawing too much or too little amps., less than .25 or more than 2.5 amps
The heater should be 1-2 amps resistance. It operates with PWM, so looking for ground in the controller is pretty much futile. The temperature is calculated using the resistance of the heater.
Don't make me embarrass you, you're an absolute troll. A low reference is a ground, 0 1, high low, these are dc circuits.... it literally shows it being grounded in the diagram you posted (but clearly switched). The heater circut only comes on until it is heated. It doesn't stay on 24/7. If you're such a genius, tell me why fuse 33 is connected to a relay that keeps things on the entire time the engine is running? Explain why bank one sensor 1 works perfectly fine? I can tell you why, the sensor was grounding on the body from a bad flex pipe, and it would generally blow while I didn't have time to diagnose it (driving down the road) so I'd simply change the fuse out. Over time it killed most likely a diode in the pcm. Get off your high horse man, just because you think you have skin on a hhr fourm doesn't make you an expert. If I revealed myself you would be absolutely embarrassed...
You would be arrested for public indecency, and I would giggle.
Actually low ref is some voltage between 3.5 volts and 0 volts that stays exactly the same at all times, usually exactly 0 volts whereas ground is a negative value. Similar, not the same.
A diode is a type of transistor. Digital high in the HHR is mostly exactly 5 volts, digital low can be anything below 3.5 volts usually 0 volts., not ground. The switch is a PWM circuit so looking for ground is not right you would look for a frequency.
I don't know how grounding the + side of a circuit would send enough back current to blow a diode. Possible if the Low side was shorting to voltage.
#33 powers the ECM, the car would not run without it.
Go to Facebook if you want high horses. I ride a wheelchair. No insults thrown at you.
Sorry, once again my attempt to help is met with anger.
You would be arrested for public indecency, and I would giggle.
Actually low ref is some voltage between 3.5 volts and 0 volts that stays exactly the same at all times, usually exactly 0 volts whereas ground is a negative value. Similar, not the same.
A diode is a type of transistor. Digital high in the HHR is mostly exactly 5 volts, digital low can be anything below 3.5 volts usually 0 volts., not ground. The switch is a PWM circuit so looking for ground is not right you would look for a frequency.
I don't know how grounding the + side of a circuit would send enough back current to blow a diode. Possible if the Low side was shorting to voltage.
#33 powers the ECM, the car would not run without it.
Go to Facebook if you want high horses. I ride a wheelchair. No insults thrown at you.
Sorry, once again my attempt to help is met with anger.
Dude, look at the diagram that YOU posted. See that upside down fork? That is ground/earth.... and it is clearly switched... the heater circut is not a sensor, it is either on or off.. it is a 12v circut....you're not entirely wrong about low reference, but in this case you are. It is not pwm. The other part of the 02 sensor is definitely a pwm signal. The o2 senor has 2 circuts....
A diode can be many things, they come in many forms, but in this case it's certainly a junction diode that protects the ground circuit in the rest of the pcm from the heater circut. Quit acting like you're a genius...
