Question about 2000 Volkswagen Jetta TDI

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Engine check light on, code P0380, glow plug circuit. What to check.

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First check glow plugs resistance values, sorry but i cannot tell you what they are supposed to be at offhand.

if the values are correct then you may need to replace the wiring harness which connects to the glow plugs.

more likely to be the plugs themselves though

Posted on Oct 06, 2009

  • david kennedy Jun 01, 2013

    i looked the code up on a vauxhell site and it sayd replace the optical sensor or the power train module? i have no idear what these are?

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Hello I have a 04 Vauxhall Vectra c 1.9 cdti sri with an erroe code, p0380? I have replaced the glow plug relay and still the code comes up (after wiping the code then starting)again, any help on what to replace?

Posted on Jun 01, 2013

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Posted on Jan 02, 2017

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SOURCE: glow plugs check enging light

did you clear the code? some codes don't get cleared automatically when the problem is fixed. take it by an auto parts store and ask them to clear it and see if you get the code back.

Posted on May 08, 2009

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1 Answer

What are these codes


P0380 - Glow Plug/Heater Circuit 'A' Malfunction https://www.autocodes.com/p0380.html

P0483 - Cooling Fan Rationality Check Malfunction https://www.autocodes.com/p0483.html

Dec 31, 2016 | 2003 Chrysler PT Cruiser

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I have a 2000 jetta TDI 1.9L. The glow plug light is flashing off and on and the car is running terribly. Code is reading P0380/glow plug monitor circuit. what do I need to do to fix the problem?


the code is for the Glo-plugs circuit A --malfunction=== causes wiring--glow plug relay--fuse-- glow plugs---ECM. Check the relay and the fuse

Oct 31, 2013 | 2000 Volkswagen Jetta TDI

1 Answer

Engine code p0380


EOBD II Error Code: P0380
Fault Location:
Glow Plug/Heater Circuit Malfunction
Possible Cause:
1.No Pre-Glow Period.
2.Poor Cold Starting.
3.Wiring harness.
4. Glow plug relay.
6. Fuse.
7. Glow plugs.
8. Engine control module (ECM).
Possible Solutions:
Check Glow Plug Wiring.
Check Glow Plug(s).

Mar 19, 2013 | 2005 Toyota Yaris Verso

1 Answer

Error Code P0380


glow plug circuit malfunction; the glow plugs have to be checked and their supply voltage as well.

Mar 08, 2013 | Cars & Trucks

1 Answer

The engine light went on so I check it with diagnostic and and gave me the code P0380 Gold plug/heater Circuit A.


CODE PO380 GLOW PLUGS CIRCUIT A MALFUNCTION. POSSIBLE CAUSES. GLOW PLUG RELAY CONTROL CIRCUIT IS OPEN SHORTED TO POWER OR GROUND CIRCUIT IS OPEN, GLOW PLUG RELAY IS STUCK IN POSITION CAUSING CONSTANT POWER, GLOW PLUG RELAY IS DAMAGED OR HAS FAILED, PCM HAS FAILED.

Feb 24, 2011 | Dodge Sprinter Cars & Trucks

1 Answer

PO380 and p1316 what do thies coads mean.


P0380 - Glow Plug/Heater Circuit "A" Malfunction
Bad glow plug. The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The engine control module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, DTC P0380 will set.

- The glow plugs are commanded OFF and the glow plug feedback is more than 2 volts. or
- The glow plugs are commanded on and the glow plug feedback is not between 5 volts and 6.2 volts.

Keep in mind that the "wait to start" light only comes on while the voltage is dropping in that circuit. This should only take 3-5 sec's. If it takes longer, refer to your "Likely problem" you listed above. That would be the Heater Module. If your glo plugs stay on, your batteries would be dead in no time. If any of your plugs go bad, they would each be listed on the reader per cyl 1-8. If you need to change the Module,


P1316 - Injector Circuit / IDM Codes Detected.
This code indicates that codes are stored in the IDM

Possible causes are as follows:
- Injector(s) or circuit(s)
- Open or shorted IDM enable circuit
- Open/short in EF circuit
- Open/short in FDCS circuit
- IDM relay
- IDM powering circuits
- Failed IDM
- Failed PCM

Check your Injector Driver Module wires, circuits 821 (Brown/Orange) and 818 (Grey/White) between the PCM and IDM. On the IDM side, the connector pin numbers are 17 for circuit 821, and pin 4 for circuit 818. You should check for high resistance in that circuit, short to ground, or open circuits. If wiring checks out good, you may need to replace your IDM. It's not uncommon for water intrusion into the module, due to its mounting location. Also check the engine wiring harness where it routes up over the driver side shock and/or driver side valve cover. That code is either a key-on/engine-off or a continuous memory code.


Hope this helps (remember to rate this answer).

Feb 04, 2011 | 1999 Ford F350 Regular Cab

1 Answer

Glow Plug system diagnosis


I HAD SAME CODE TO BUT NOTE THE CODES MIS READING DUE TO THIS Check under seat unplug control module see if it is wet with fluid . cost me $138.00 fee.
Engine light on than next day off may 2 day then on at same place drive kid to school.
issue with transmission fluid wicking up the harness into the control module and causing the module to malfunction. Usually, the harness from the transmission to the ETC module is replaced and the module is replaced provided the leak is repaired. In some cases this may be more than is actually needed but it usually fixes the concern. Transmission fluid does not actually damage the module and can be flushed away with board cleaning solvent or electrical contact cleaner as a first attempt. Always repair the leak before replacing a module.
http://www.benzworld.org/forums/w163-m-class/1465231-mercedes-repair-maintainance-transmission-etc-tips.html

Jul 19, 2010 | 2006 Dodge Sprinter

1 Answer

Glow plugs check enging light


did you clear the code? some codes don't get cleared automatically when the problem is fixed. take it by an auto parts store and ask them to clear it and see if you get the code back.

May 03, 2009 | 2000 Volkswagen Jetta TDI

1 Answer

Working on 2006 dodge sprinter 3500 trubo diesel with engine light on put scanner on and got 2 codes, P0671 cylinder N.1 glow plug circuit and P0380 glow plug circ perf also intake air heater relay N.1...


I did this exact thing.. I see your date of posting is a while ago, however let me know how you ended up.. If you leave the battery connected while installing the relay you can short it out causing the problem all over again.. also there is a couple points that run along that wiring harness that are known to rub through.. let me know how you did!

Mar 20, 2009 | 2006 Dodge Sprinter

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