What Is P1193 Code on 6.7L Cummins & How to Fix It?

Just like all other efficient engines on the road, the Cummins displays its fair share of the DTC or the Diagnostic Trouble Codes. Even if you are an expert, it’s not possible to keep track of what every code means because there are hundreds of them. And trust me, if you ignore them, it would add to both the troubles and the expense.

The P1193 code on your 6.7 Cummins implies the Inlet Air Temperature (IAT) Sensor High Condition which happens due to a poor circuit on the IAT and some other reasons too.

So, if your mighty 6.7 Cummins is showing this code, you don’t need to sweat it out. Relax and read through this guide that will give you an in-depth look into the causes, symptoms, solutions, and fixing costs. Let’s hop on!

P1193 Code On 6.7L Cummins

What Does the P1193 Code Mean On a 6.7L Cummins?

We know the P1193 code means issues with the IAT. But what is the IAT? The Intake Air Temperature Sensor is a wired thermostat that has a lowered signal voltage and resistance as the intake air temperature drops.

The IAT sensor voltage is supervised by the PCM (Powertrain Control Module) regularly to check the air density due to temperature. The circuit monitoring process runs as the engine functions.

Various trucks and vehicles with the Cummins engine, especially the 6.7 Cummins use the DTC P1193 code that indicates the IAT sensor voltage level higher than 4.9 volts. Of course, this is detected by the PCM.

  • P = OBD-II Diagnostic Powertrain; trouble code for your engine
  •  1 = Fuel and Air Metering
  •  1 = System Pressure too high
  •  93 = Specific fault index (In our case, Exhaust gas sensor B circuit high)

How Serious Is P1193 Code On 6.7L Cummins?

Although in the first phase of detecting the P1193 code, the engine or the 6.7 Cummins will not stop functioning; it will cause a serious performance downfall of the engine.

The P1193 code will show in case of a major failure in the inlet air temperature sensor voltage supply circuit. Of course, this gives a rise to the malfunctioning of the sensor and prevents it from working as usual.

Now with a malfunctioning air sensor, the engine will start to run violently and ineffectively which can proceed to long-term engine issues.

So, before your 6.7 Cummins gets permanent heads down, it is important to attend to the issue when a P1193 code is showing.

Read Also: What Does Code P0628 Mean on Cummins? (How to Fix It)

What Causes the P1193 Code on 6.7L Cummins?

 There are several reasons why the Inlet Air Temperature Sensor shows a high condition. The primary reason can be the extremely high fuel rail or system pressure. Besides, the other probable causes include-

  • Defective Inlet Air Temperature Sensor
  • Open, misplaced, or shorted Inlet Air Temperature Sensor harness
  • Malfunction in the Powertrain Control Module that sends voltage to the IAT
  • Poor electrical connection to the Inlet Air Temperature Sensor Circuit

Other Symptoms of Getting P1193 On 6.7L Cummins

There are some symptoms that will let you know that there is a P1193 code running. The usual would be the engine lights illuminating frequently. Besides, there are other symptoms of the P1193 code coming about, such as-

  •  As you press the gas pedal, the vehicle does not seem to accelerate
  • As you press the accelerator, the engine suddenly and abruptly stops
  • Besides, if you pay close attention to your vehicle, you might see a deterioration in the gas mileage efficiency.
  • It may also show low gas pressure
  • Lower engine power than usual with a cold start
  • Clattering or clinking noise coming from the car back
  • Misfiring of the engine etc.

Read Also: What Does Code P0652 Mean On Cummins? (How to Fix It)

4 Steps to Fix the P1193 Code on a 6.7L Cummins:

If you are not an automobile enthusiast, you might surely have trouble finding a probable solution for the P1193 code on your 6.7 Cummins. In such cases, it is best to leave it to the professionals from a well-known automobile store.

However, if you think you can give it a try, then here are the steps to your P1193 code fixing. So, in the preliminary phase, you must have a basic OBD-II code reader for diagnosing the P1193 DTC. Then you can carry on with the steps as follows-

Step 1: IAT Sensor Examination

Take a close look at the IAT sensor and inspect the sensor’s wire for being broken, bent, burnt, or damaged. Make repairs or alterations to the wire so it is back in the game. Examine the connectors and the harness to find if there are any busted or impaired sensor parts and replace them if not repairable.

Step 2: Match IAT Readings with Standards

Next, you need to check and monitor the Intake Air Temperature Sensor voltage and circuit connections. Check the manufacturer’s standards beforehand and make sure the readings comply with the standards.

Step 3: Voltage Repair

If there is extreme voltage, then you need to make necessary repairs to fix it in the following way-

  • Get a digital multimeter to check voltage, if it does not show it, check for breaks in the battery, starter solenoid, or the cable.
  • If the multimeter indicates voltage but the starter does not function it needs to be replaced.

Step 4: Replace IAT Sensor Resistance If Necessary

Do not forget to examine the resistance of the Intake Air Temperature Sensor if it complies with the given standards for optimized sensor functioning. If you see otherwise, you’ll have to replace the sensor with a new one.

Read Also: What Does P0735 Code Mean On Cummins? (How to Fix It)

How Much Does It Cost To Fix Code P1193 On 6.7L Cummins?

For the diagnosis, it will take about an hour for the professionals if you take their help. However, if we were to list out the actual cost of diagnosis, you should know it varies as per the vehicle type, model, engine type, and even as per the region.

If you go to your reputed local auto repair shop, the hourly rate would be within a range of $75 to $150.

Read Also: What Does Code P1222 Mean On 6.7L Cummins? (How to Fix)

Can You Drive Your 6.7L Cummins With P1193 Code?

Well, the 6.7 Cummins engine will not stop functioning with a P1193 code on, hence yes, you can drive your 6.7 Cummins with the DTC. However, it is in no way recommended by the professionals.

If there are issues with the IAT sensor, the air intake of the engine will not go as planned, and hence, it will misfire or even stop when cold. At some point, the engine may stop abruptly without any prior warning, this will of course harm the engine efficiency, may damage your engine permanently, or even cause harm to you!

Hence, although the display of the code P1193 does not indicate an emergency you should be scared of. However, it is recommended not to delay and fix the issue as fast as possible.


If your 6.7 Cummins is showing the code P1193 and you were probably looking for the causes or the solutions, we hope this troubleshooting guide has helped you enough.

Take this advice; remember to diagnose the problem as soon as you see any symptoms of the issue and fix it without a delay. Not only will it save you money, but your time, and even permanent damage as well. That’s not just what we are saying, it’s what the experts say.

Do not hesitate to take it to the professionals. Don’t think about the cost and idle away, the more you delay, the higher the costs stack.

Read Also: What Does Code P0607 Mean On Cummins? (How to Fix It)

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