Q: When it is cold outside. It will not start.Can you please help me?

asked by on

When it is cold outside my 1997 Chevy k1500 will not start. I had it on a code reader and it shows code P0420 and P 1351. I need help. I have replaced a lot of parts.

My car has 132567 miles.
My car has an automatic transmission.


The codes listed are for issues with the emissions and ignition systems. Code P0420 indicates that the catalyst efficiency for bank 1 is below the specific threshold. That is, that the computer has detected that the catalytic converter is not reducing emissions properly. This can be caused by many things, most commonly faulty oxygen sensors or depleted catalytic converters. Code P1351 indicates that the computer has detected an excessively high voltage for the ignition circuit. This is likely related to your truck’s no start condition. A few possible causes for this are a faulty ignition relay, ignition switch, ignition module / coil, or a faulty ECM. I would start by testing the ignition system components one by one to see if any of them may be malfunctioning, before moving on to testing the computer for possible faults. Once this issue is cleared and the truck starts, then you can move on to solving the other trouble code.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. When it is cold outside. It will not start.Can you please help me?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car is misfiring and has a lack of power

It is very difficult to definitively say what the issue is. Have you had the vehicle scanned for diagnostic troubleshooting codes? If not, you should start there. Due to your vehicle being pre-1996, the method of receiving codes will be...

Q: Pulled out ignition fuse and put back, now Lexus isf won't turn over.

Removing the fuse while the circuit was powered might have caused the fuse to open. Both fuses should be tested for continuity. If the fuses are intact and they are securely installed but the car won't start, there's a possibility...

Q: I need to figure how set a pin and drive for the cover on a wiper motor for a 99 Monte carlo

I looked at both the instruction card for the Cardone re-manufactured wiper unit (Part Number: 40-1006) and the service manual instructions as well as photos of the components beneath the pulse board that I believe you are referring to. There...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.