Q: P0380

asked by on March 02, 2018

P0380 I have replaced glow plugs, 180 relay, glow plug wire harness. Checked all fuses, and replaced battery. Everything is testing to specs yet code keeps poping on. What am I missing here.

My car has 160000 miles.
My car has an automatic transmission.

Electrical components are not working Inspection $79.99 - $89.99 Get a Quote

The glow plug wire harness is not the entirety of the circuit. The circuit fault represented by P0380 could arise in the wiring to the harness that you replaced, including the ground connection. To determine the integrity of the remaining wiring and terminals requires voltage drop testing. Mere continuity, as reflected in ohmmeter tests is not enough. Also, check to see if your application uses timers or a control module as faults there can account for the code. That information will be on the Factory wiring diagram. If you continue on with the diagnostic you have performed thus far, you will find the circuit resistance that is causing the code to set. It doesn’t take much resistance at all to create a 10% voltage loss, which is the threshold at which the code will set. If you want the remainder of the diagnostic performed by a mechanic, please request an an electrical component/circuit diagnostic and the responding certified mechanic will get this diagnosed and resolved, right at your location. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

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

What others are asking

Speedometer broke.

The vehicle speed sensor (VSS) is the most likely cause of your inoperative speedometer. The powertrain control module (PCM) uses the VSS signal to determine the control of outputs such as speedometer operation. The VSS circuit or speedometer gauge could...

My Check Engine Light is on - 2001 Toyota 4Runner

Hi there: When the traction control light comes on (and the system is not engaged manually), it's usually an indicator of a wheel sensor or transmission speed sensor issue as both of these parts are critical for monitoring and controlling...

engine rev up and down on idle

This may be related to a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at...

Car wont start. It cranks but does not fire (I even tried starting fluid)

There are several possible causes for a vehicle to crank and not start. There could be a bad fuel pump, faulty plugs, bad timing belt/chain, faulty ignition, failed camshaft/crankshaft sensor, or any number of other possible causes. It would first...

Engine running rough - 2001 Ford F-150

Hi there. Have the codes returned since the repair? It sounds like the valve timing control valves are sticking. The valve timing control valves control oil flow to the valve timing actuator and are a duty cycle type controller. The...

Car stutters on initial startup when cold 2001 Toyota Camry

Hello - a "hard start when cold, or left overnight" is usually a fuel mixture problem during cold start. The coolant and air temperature sensors cause problems when they do not accurately measure coolant and air temperatures, report bad temperature...

Restraint system visit your workshop

The warnings refer to your vehicle's "Supplemental Restraint System" (SRS) which is the vehicle airbag system. The airbag control computer stores trouble codes in the event of a malfunction so what you can do is request an airbag warning light...

How many rotors does a 2001 Honda Accord LX have?

This year of Honda Accord came equipped with either rear drum or rear disc brakes. Your vehicle would need to be inspected to see what it was equipped with.

2000 vw cabrio. How do I put tension on the power steering pump belt? Thanks

Your vehicle may be equipped with an automatic tensioner. If so, it will be assembly that is spring loaded and pivots to maintain a constant specified pressure on the belt. If it is so equipped, there might be a problem...

Related articles

The Best Used Cars to Buy If You're a Rock Climber
If If you’re a rock climber, you want a vehicle that gets you where you need to go, even if the terrain gets rough. You may be living out of your vehicle at times, so you also want a rig...
A Buyer’s Guide to the 2012 Volkswagen Jetta SportWagen
The The station wagon is making a big comeback with American car buyers. While SUVs are still popular, we’ve seen a lot more sales of compact SUVs, crossover utility vehicles, and sport wagons lately. Among those, the 2012 Volkwagen Jetta...
The Top 5 Selling Cars in Connecticut in 2012
Connecticut Connecticut offers plenty of rain and its fair share of snow during the winter months, which means drivers need vehicles that can handle these conditions. Top selling vehicles in previous years have included the Toyota Camry, Corolla and the...