Q: My 2003 altima has issues starting in the heat.

asked by on September 12, 2017

It is throwing a camshaft position sensor and a engine coolant temperature sensor. I have cleaned the throttle body and fuel injectors using seafoam. I have no idea what to do next. Please help!

My car has 140004 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What does the engine coolant temperature Warning Light mean?
The engine coolant temperature Warning Light is located on the instrument panel. This light illuminates when the temperature of the engine coolant has risen to a dangerously high temperature. To avoid serious damage to your engine, stop your car as...
Bad gas mileage
Hi there. The fuel mileage is never great in this car, but this is rather low. Most of the time if it is running fine and has recently dropped off it is because or a dirty air filter (https://www.yourmechanic.com/article/common-signs-of-a-dirty-air-filter) or...
Rough idling, check engine light on
First have an experienced technician, like one from YourMechanic, look the vehicle over and read the fault codes (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) from the vehicle. The trouble code may unveil a problem causing the rough idle (https://www.yourmechanic.com/services/car-idle-is-rough-inspection). Otherwise make sure the maintenance has...
I was told to change my valve gasket and valve cover. Should I?
Hi, thanks for writing in. Five years is a bit on the early side to have a leaking valve cover gasket. The labor time is 3 hours to replace that gasket and YourMechanic typically charges around $400 (part and labor)...
Acceleration problem
Hey there. This may be related to a fuel delivery issue such as a faulty mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) or throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement). As you may know, the mass air flow sensor regulates the air intake as it...
Why does my car jump/shake when turning left, after i got my right cv axle and lower ball joint replaced?
Hello - from your description, it sounds like the left (driver) side CV joint and axle (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-cv-boot) are bad as well, and should be replaced. The outer CV joints take a beating while turning and applying power. It is possible...
If I'm bypass the heater core will I still get heat in my car
Hello. No you will not still have heat. The heater core uses the hot coolant from your engine and radiates it into the cabin to produce the heat you feel from your vents. Also a bad heater core is a...
80k service cost
Hi there. We have a great online tool here on this website that will allow you to look up all recommended services for your Volkswagen GTI at different mileage intervals. Simply click this link and enter your vehicle information (https://www.yourmechanic.com/scheduled-maintenance)....
Smog check failed due to Oxygen sensor
Hello, thank you for writing in. The first person to tell you this was correct to a certain extent. If the system is not warmed up, the readings cannot be taken accurately. However, if the engine is warmed up and...

Related articles

A Buyer’s Guide to the 2012 Nissan Frontier
When When looking for a truck, the 2012 Nissan Frontier could be the vehicle you’ve been hunting for. It has a great look, a strong engine, and it is reliable. The vehicle has been making gains on other trucks in...
A Buyer’s Guide to the 2012 Nissan Murano
The The 2012 Nissan Murano is a sleek crossover SUV that has all the modern amenities. It has ample interior space with a luxurious feel, and a driver oriented suspension. If you need a vehicle that can hold passengers and...
The Best Used Cars to Buy If You’re an Electrician
As As an electrician, you have to haul around wiring, tools and equipment, and tons of supplies. You can’t get by with a small used car, or even a big one. What you probably need is a good used cargo...