Codes after throttle position sensor change

Good morning.

If you did something wrong with the TPS, it would have coded for the TPS which it has not.

The 171,174 looks like a vacuum leak. That is the main cause for those codes. The engine is running too lean.

430 is a catalytic converter code. Bank 2 catalytic converter is bad and has to be replaced.

Resetting codes does nothing. The issues need to be addressed, diagnosed, repairs made and then they can be cleared.

From the looks of it, nothing had to do with your repair. Before you cleared the codes, did you notice when they were set? The number of counts on the codes?

Most likely they were there prior to the repair from the symptoms that you described. Rough running is not the TPS sensor. That is engine related.

As far as the no start, does it crank over or does do nothing when you turn to start?

Roy

430

P0430
Descriptor
Catalyst System Efficiency Below Threshold (Bank 2)
Probable Causes
Catalytic Converter Damaged
Cylinder Misfire
Downstream Heated Oxygen Sensor (HO2S) Wires Improperly Connected
Exhaust Manifold Damaged
Exhaust System Pipe Damaged
Fuel Pressure Incorrect (Excessive)
Heated Oxygen Sensor (HO2S)
Ignition Timing Retarded
Leaded Fuel
Malfunctioning Engine Coolant Temperature (ECT) Sensor
Muffler and Tailpipe Assembly Damaged
Oil Contaminated

171,174

P0171
Descriptor
System To Lean (Bank 1)
Probable Causes
Air Leaks After Mass Air Flow (MAF) Sensor
Cam Timing
Cylinder Compression
Exhaust Gas Recirculation (EGR) Valve Stuck
Exhaust Leaks Before or Near Heated Oxygen Sensors (HO2S)
Fuel Injectors Leaking or Contaminated
Fuel Pressure Excessive
Fuel Pressure Regulator Leaking
Gasket Leaking
Improperly Seated Engine Oil Dipstick
Leaking Diaphragm or EGR Vacuum Regulator (EVR)
Low Fuel Pressure or Running Out of Fuel
Oil Overfill
Positive Crankcase Ventilation (PCV) System
Vacuum Leaks
Vapor Recovery System

c016

You did not erase the adaptive memory. You just made the PCM forget the codes.

Did you check for fuel pressure and spark?

Roy

This is why you need to check for spark and fuel.

Try spraying some starter fluid in the air filter and see if it start and stalls.

When you crank the engine, does the tachometer move up a little to reflect rpm?

It could be a fuse, but you would also need to find out why it failed. Just replacing it does nothing as it will happen again.

Roy

I would check the fuel pressure. It sounds like you have low fuel pressure.

1121 is for TPS. Make sure it is mounted correctly, the connector is tight and clean and it is adjusted correctly. This is the sensor that controls transmission shifting.

Key on, engine off, you should have.5 volts on the signal wire. Push down the fuel pedal and the voltage should rise to 4.8 volts at full throttle.

Roy

P1121
Descriptor
Throttle Position (Tp) Sensor Inconsistent With MAF Sensor
Probable Causes
Air Leak (Vacuum 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

You will need a scan tool to monitor the actual voltage at idle and full throttle or back probe the signal wire and check with a volt meter.

Roy

You are welcome.

Glad to help.

The TPS is the main sensor that controls transmission shifting times. If you did not have an issue prior to your repair and you now have this issue, it may be the brand TPS you are using. I would get an OEM sensor and you will need to check the voltages as I suggested a couple of times.

The transmission is not in safe mode, it is just not shifting due to lack of signal to allow it to shift.

Roy