Codes P0068, P1120, PO316, PO301

What problems are you experiencing? Can you supply the 17 digit VIN number so I can check for TSB's against your exact model.

Hello,

These are MAF, TPS and misfire codes. I would replace the MAF sensor with the correct sensor and change the spark plugs out.

Here are two guides to help us fix the problem:

https://www.2carpros.com/articles/how-to-replace-a-mass-air-flow-sensor-maf

and

https://www.2carpros.com/articles/how-to-change-spark-plugs

Clear the codes once completed.

Please let us know what happens.

Cheers, Ken

Good afternoon.

The 316 possibilities are below. The 301 code is most likely due to the 316 code. Once that is repaired the 301 should go away.

I will check the other codes.

Roy

P0316
Item description.
Symptom/DTC P0316.
Descriptor.
Misfire occurred in the first 1,000 engine revolutions.
Probable causes:
Crankshaft position (CKP) sensor damaged.
Engine mechanical malfunction.
Fuel Injectors.
Fuel quality poor or degraded.
Ignition system.
Power-train control module (PCM) damaged.
Vehicle running out of fuel.

Okay.

The 68 possibilities are below:

Roy

P0068
Item Description
Symptom/DTC P0068
Descriptor
Throttle Position (Tp) Sensor Inconsistent With The Maf Sensor
Probable Causes
Air Leak Between Mass Air Flow (MAF) Sensor and Throttle Body
Mass Air Flow (MAF) Sensor Damaged
Throttle Position (TP) Sensor Damaged
Throttle Position (TP) Sensor Not Seated Properly

The 1120 is a reference voltage code. This is the reason the 68 code came up. When this code is repaired, the 68 should go away

Roy

P1120
Item Description
Symptom/DTC P1120
Descriptor
Throttle Position (Tp) Sensor Out Of Range Low (Ratch Too Low)
Probable Causes
Reference Voltage from Powertrain Control Module (PCM) Open to Throttle Position Sensor
Reference Voltage from Powertrain Control Module (PCM) Shorted to Signal Return
Throttle Position (TP) Sensor Loose Pins
Throttle Position Circuit Connectors Corroded
Throttle Position Circuit With Frayed Wires

There is nothing to replace at this point. The codes need to be checked through the flow charts. Once the flow charts are completed, then the failed part or wiring issue will be identified and then repairs can be made without replacing parts that are not necessary.

At this point it is a guess. Guessing is expensive and in most cases wrong. That is why a diagnostic needs to be done to accurately find the failure.

Roy

What have you tried so far?