Q: Getting multiple codes

asked by on

I am getting codes P1507, P0135, P0155.

Hello. When you get these codes together it is typically the result of a vacuum leak. If there is too much air entering the engine, your truck will have idling problems and this will cause issues with the oxygen sensor readings. I would typically start by checking all of the vacuum hoses and do a smoke test on the engine to see if any leaks are present. If there are not any leaks, then I would use a scan tool to monitor the sensor inputs to see if the air volume sensor is reading correctly. This would help to narrow down the problem. If you were going to have a shop diagnose this, consider YourMechanic, as a certified mechanic can come to your office to perform these tests and repair the vehicle.

Was this answer helpful?
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. Getting multiple codes

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: Po155cnf bank 2 sensor heater circuit P1620cnf Also code

The P0155 is the oxygen sensor located on the rear bank of cylinders and before the catalytic converter. Given your mileage, both oxygen sensors (pre-catalytic converter) should be replaced. The pre-cat sensors have the most affect on fuel mixture, saving...

Q: Q: Coolant leaking

If there is smoke, a leak is likely. Losses in the coolant reservoir would suggest a coolant leak. If you suspect a coolant leak, the origin can be pinpointed if you request a coolant leak diagnostic. It is possible to...

Q: How do I calculate the fuel economy?

Calculating fuel economy will help you keep track of how much gas your truck uses. Knowing this is helpful to most drivers. To calculate the fuel economy. Fill the fuel tank completely and record the odometer reading. If you...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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.