P0304 Cylinder 4 Misfire Hyundai Elantra: Coil or Spark Plug: How to Diagnose and Fix It Correctly
P0304 on a Hyundai Elantra means the ECM has detected a misfire specifically in cylinder 4, which is most commonly caused by a failed ignition coil (coil-on-plug), a worn or fouled spark plug, or on direct-injection Elantra models, carbon buildup on the intake valve of cylinder 4 disrupting the air-fuel mixture. The coil-swap test: moving […]
P0335 Crankshaft Position Sensor Subaru Forester No Start: Complete Diagnosis and Fix Guide
A P0335 trouble code on a Subaru Forester means the engine control unit (ECU) has lost the signal from the crankshaft position sensor (CKP sensor): and without this signal, the ECU cannot determine where the crankshaft is in its rotation, which means it cannot time fuel injection or ignition spark, resulting in a no-start or […]
P0380 Glow Plug Heater Circuit Chevy Duramax Diesel Hard Start: Complete Diagnosis and Fix Guide
P0380 on a Chevy Duramax diesel means the PCM has detected a fault in the glow plug heater circuit: the system that preheats the combustion chamber before cold starts: and the most common causes are a failed glow plug control module (GPCM), one or more failed individual glow plugs, or a wiring fault in the […]
P0351 Ignition Coil A Primary Secondary Circuit Ford Mustang: Diagnosis, Causes, and Repair
P0351 on a Ford Mustang means the PCM has detected a fault in the primary or secondary circuit of the ignition coil assigned to cylinder 1 (Coil A): the most common cause is a failed coil-on-plug assembly on cylinder 1, which can be confirmed in under 20 minutes using the coil swap test, but the […]
P0480 Cooling Fan Relay 1 Control Circuit Dodge Charger Overheating: Complete Diagnosis and Fix Guide
P0480 on a Dodge Charger means the PCM has detected a malfunction in the control circuit for cooling fan relay 1: which controls the primary electric cooling fan: and on Charger models this most commonly results from a failed fan control module, a burned-out cooling fan motor, a blown fuse in the fan circuit, or […]
P0562 System Voltage Low GMC Sierra: Alternator or Battery: Complete Diagnosis Guide
P0562 on a GMC Sierra means the ECM has detected battery or system voltage below approximately 10.0 volts for longer than 30 consecutive seconds: and on Sierra trucks this is most commonly caused by a failing alternator that can no longer maintain charging voltage, a battery that has lost capacity and cannot hold charge, or […]
P0597 Thermostat Heater Control Circuit Ford Focus: What It Means, Why It Happens, and How to Fix It
P0597 on a Ford Focus means the PCM has detected an open circuit in the thermostat heater control circuit: a unique fault that most drivers have never heard of because Ford uses an electrically heated thermostat that most other manufacturers do not, and when the heater element in the thermostat fails or loses its circuit […]
P1101 Intake Airflow System Performance Chevy Malibu Rough Idle: Causes, Diagnosis, and Fix
P1101 on a Chevy Malibu means the PCM has detected a discrepancy between what the mass airflow (MAF) sensor is reporting and what the PCM expects to see based on throttle position, engine speed, and manifold pressure: most commonly caused by a contaminated MAF sensor, a dirty air filter restricting airflow, a cracked or disconnected […]
P1320 Ignition Signal Primary Nissan Maxima Multiple Misfire: Complete Diagnosis and Fix Guide
P1320 on a Nissan Maxima is a manufacturer-specific code that means the ECM is not receiving the ignition confirmation signal from one or more of the power transistors integrated into the coil-on-plug assemblies: and on the VQ35DE and VQ35HR engines, this code almost always appears alongside random misfire codes P0300 through P0306 because the same […]
Average Cost to Replace Power Steering Rack and Pinion: Labor and Parts Breakdown
Power steering rack and pinion replacement costs $400 to $1,200 total at an independent shop for most front-wheel-drive and rear-wheel-drive passenger vehicles, with parts accounting for $180 to $600 of that total and labor accounting for $200 to $500, plus a mandatory wheel alignment that adds $80 to $150. Electric power steering (EPS) racks on […]