Question about 1993 Volvo 850

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Code 122 of A&, 93 Volvo 850


I got three codes off my car, A1 313, A3 444 and A7 122. Are ALL of these related to the PNP sensor or is the A7 122 caused by a different problem?

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I am not a mechanic, but was recently looking into codes for my 1994 850. Here is what I found out...perhaps it will be useful to you if you do not already know this: The A1 313 is for a "Faulty gear position sensor PNP" ; can not find info on the others. My limited understanding is that the other codes refer to different systems; e.g. the A1 is for transmission codes, A2 is for fuel system, etc.

Posted on Nov 26, 2009


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Dec 07, 2013 | Cars & Trucks

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what engine,, 2Lx4 or 2.5L V6?
first off ,nobody needs to do anything, free country still.
but the 135s are clear.
135= B1S1 bank 1, sensor 1,
on 4 banger its the all important front sensor
on v6 its left front bank sensor.
and the code means, the heater in the sensor id DEAD.
or the wire to it melted and is broking off.
the ECU never lies. about this, the current to the sensor is zero. and bad.
you can buy a bosch sensor in any car store in the USA, (all)
you can use the PNP,plug and play or hand wired. both ways
are 100% effective.
what happens is your motor runs rich until fully warm.
that causes, 3 things (top three of many)
1: cold drive-ablity.
2:wasted fuel.
3 : over works the CAT , cutting its life span a lot.

Mar 28, 2013 | 2005 Suzuki Grand Vitara

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Can .p1151, .p0174, p0401, .p0153 all be related

Not exactly.
Codes 1151 - 174 - 153 all point to a faulty O2 sensor bank 2 sensor one. That is the sensor ahead of the catalytic converter. All three codes state the sensor is reading the fuel mixture is too lean. It could be lean but you should also have codes for the sensor on bank one.
Code 401 is for a low air flow for the EGR valve which would probably be a different issue. Its possible the EGR valve is faulty and that could affect the fuel mixture but usually for the EGR to cause a lean mixture the EGR would cause a vac leak not fail to open.

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P 0705 transmission range sensor circuit malfunction code for a 2001 mitsubishi galant can i replace it and where is it located

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1 Answer

Check engine light is on took to auto zone they gave me a code that said P1166

Hello there:
P1167 and P1166 codes relate to the primary O2 sensor heater malfunction.
there are two different O2 sensors, a "universal" sensor from Autozone and a supposedly OEM sensor from O'Reilly's. Both of them may cause the car to throw a p1166 or P1167 code and run rough. so i highly recommend getting a O2 sensor from Honda, and this will fix the problem .
It turns out that none of the aftermarket probes from Bosch or Denso will work on a ULEV (F23A4) 4 cyl. engine. Honda had different part number probes for the normal VTEC 4 cyl. and the ULEV Vtec engine and the probes look different and have different length cables. The computers at O'Reilly's, Autozone, or NAPA made no distinction between these two engine types.

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Diagnostic warning light.....diagnostic done at kia dealer... no obvious but told it might be mixture problem as they had seen same before. Any ideas?


Mixture problems can be caused by a number of factors and faults. A computer module, the PCM, determines the mixture using data from different sensors. Re-circulated gas is also used to determine the mixture.

If the problem only happened at cold, then check the MAF (mass air flow) and (IAT intake air temperature) sensor, and also have the vacuum system tested for leaks, hat can affect the mixture and make a difference, particularly when idling.

If the problem reported by the error code was mixture related, then a common cause is often the EGR valve, that regulates gas re-circulation. In this case the engine will be running rough at idle and when driving.

More problems that can return mixture related codes can concern:
Fuel injector problems (voltage , leaking injector, dirty injector). In that case more codes may be returned. Excessive or insufficient fuel pressure due to fuel lines, pump problem, or bad fuel pressure regulator. Gas recovery system, vacuum leaks and EGR valve. Air leaks from air intake mainfold (after sensor), or defective MAF, IAT. If sensors are faulty, then you will get more codes. If the car recently runt out of fuel, or if the fuel cap is defective you can also get an error related to mixture. Exhaust leaks before reaching the O2 sensors. Timing problem.

If the only problem was a mixture related problem, then wait to see if the code comes back. The engine warning light will turn on. In that case check for additional codes and report the code here.

Things are different if there are more codes. Also there are differences if the mixture is too rich or poor.


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1 Answer

My car indicates check engine sigh with following two codes 1: p0139 2: p0140

Hi Garcha,

Both codes relate to O2 Sensor # 2

Code P0139: O2 Sensor Circuit Slow Response - Bank 1, Sensor 2
Code P0140: O2 Sensor Circuit No Activity Detected - Bank 1, Sensor 2

A faulty O2 sensor will mean incorrect signals will be sent to the EFI computer, causing erratic engine running.


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My car is putting and jerking which sensor will cause this

The crank sensor will cause this problem, and set these other codes. It controls the ignition, and the knock sensor is timing related. I would go with the crank sensor first. Good Luck

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Mazda 626

very possible that the repair they did caused the o2 problem. The only codes u get for "leaks" are emissions related. I'd like to know the EXACT code he got, if u can find that out, I can help u even more. Thanks


Aug 02, 2008 | 1995 Mazda 626

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