Help I got these codes C12c, P0171, and P2174 -
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post #1 of 3 Old 06-25-2019, 09:29 AM Thread Starter
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Jen4brigo's Avatar
Join Date: Jun 2019
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Help I got these codes C12c, P0171, and P2174

I need help understanding these codes and now the battery light came on and my steering wheel is very hard to turn. HELP....

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post #2 of 3 Old 07-20-2019, 05:26 AM
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2011 MK Compass 
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Do you mean C121C? if its this its 'torque request denied'

P0171 is a misfire/fueling problem - engine running lean

The P2174 OBD-II trouble code is one of number of possible codes that indicates that the Powertrain Control Module (PCM) has detected a malfunction in the operation of the Throttle Actuator Control System.

Looking at that lot a couple of things spring to mind, firstly whats the condition of the alternator drive belt/water pump, if the engine was running a bit hot might cause some of these problems. Its the fact you mention the steering is hard to turn, I think the power steering pump is related to the water pump, they will certainly be run by the same belt.

Could be a result of a problem with the engine being overheated and the engine throttling power back to save itself.

Is this a Petrol or Diesel By the way?

Get it checked by a garage ASAP.

"Watcha Doin?"

"Oh you know, Jeep things....."
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post #3 of 3 Old 07-20-2019, 06:34 AM
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Might want to add model, year, eng, trans to profile makes looking for answers, know issues, TSB's, tips etc specific to your vehicle.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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