P0300 and P0171 Together With Rough Idle: Why This Combination Almost Always Means a Vacuum Leak
When your scan tool shows both P0300 (random misfire detected) and P0171 (system too lean, Bank 1) stored at the same time with a rough idle, you are not looking at two separate problems. You are almost certainly looking at one problem: a vacuum leak. The combination of these two codes together, specifically at idle, […]
P0455 EVAP System Large Leak on Chevy Silverado: Start With the Gas Cap, End With a Smoke Test
P0455 on your Chevy Silverado says the EVAP system has a large leak, and the first thing you should do is check your gas cap. Right now. Before reading further, walk out to the truck, remove the gas cap, inspect the rubber seal on the underside, reinstall it until you feel and hear it click, […]
Squeaking Noise When Turning Steering Wheel at Low Speed: Every Cause, Diagnosed by Location
A squeak when turning the steering wheel at low speed is one of the more misleading sounds a car makes, because the same symptom can come from half a dozen different components and the fix ranges from free to hundreds of dollars. The fastest way to narrow it down is to locate where the sound […]
P0711 Transmission Fluid Temperature Sensor Range/Performance: Full Diagnosis and Fix Guide
The P0711 code can sound alarming because it involves the word “transmission,” but it does not automatically mean your transmission is failing. What it means is that the Transmission Control Module (TCM) is receiving temperature data from the Transmission Fluid Temperature (TFT) sensor that falls outside the expected range or behaves in a way that […]
P0325 Knock Sensor 1 Circuit Malfunction on Honda CR-V: Why This Code Is Common and How to Fix It
Your Honda CR-V has P0325, and the first thing to understand is that this code does not mean your engine is actually knocking right now. It means the PCM has detected a fault in the knock sensor circuit and can no longer receive the signal it needs to detect knocking if it did occur. Those […]
P0014 Camshaft Position Timing Over-Advanced Bank 1: Oil First, Then Work Your Way Up
P0014 is one of those codes that looks intimidating on a scan tool but usually has a simple starting point. Before you start thinking about cam phasers and timing chains, check your engine oil. Right now. A significant percentage of P0014 codes are resolved by an oil change, and starting with oil is the correct […]
P0340 Camshaft Position Sensor on Jeep Grand Cherokee: No Start, What Is Happening, and How to Fix It
You went to start your Jeep Grand Cherokee and nothing happened. The engine cranks fine, the battery is good, but it simply will not fire. You or a shop pulled the code: P0340. Camshaft Position Sensor circuit malfunction. The engine has spark, has fuel, has compression, but without a signal from the camshaft position sensor, […]
P0135 on Honda Civic: O2 Sensor Heater Circuit Bank 1 Sensor 1 : Causes, Tests, and Fixes
Your Honda Civic has stored P0135, and now you are wondering whether you need an expensive oxygen sensor replacement or whether there is something simpler going on. Here is the reassuring reality: P0135 points to the heater circuit inside the upstream oxygen sensor, and the most common cause is not a failed sensor at all. […]
P0700 and P0740 on Honda Accord: What These Transmission Codes Mean and How to Fix Them Without Panic
You scanned your Accord and got two codes back: P0700 and P0740. Before you start worrying about a full transmission rebuild, here is something important to understand: P0700 is not its own problem. It is your car’s way of saying “hey, the transmission control module found something, and you should check what.” The actual diagnosis […]
P0101 on Nissan Altima: MAF Sensor Symptoms, Causes, and How to Fix It Without Guessing
Your Nissan Altima has a P0101 stored and the check engine light is on. Maybe the car is idling rough, maybe it is hesitating under acceleration, or maybe you would not even know anything was wrong if the light had not come on. P0101 is a Mass Air Flow sensor out of range code, and […]