Code
P0675
Generic
P — Powertrain
Cylinder 5 Glow Plug Circuit/Open
Views:
UK: 15
EN: 19
RU: 21
AI status
Completed
Completed
100%
Causes
- Failed glow plug (open or high resistance)
- Broken or corroded connector at glow plug
- Damaged wiring harness (open circuit, chafing, broken conductor)
- Poor or missing ground at glow plug or harness
- Blown fuse or faulty glow plug relay/driver
- Corroded terminal or water ingress in connector
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Hard cold starting or extended crank time
- White or increased smoke on cold start
- Rough idle or reduced smoothness after cold start
- Possible longer preheat lamp indication on dash
What to check
- Read freeze frame and pending codes; confirm P0675 is current
- Visually inspect glow plug connector, harness, and ground for damage or corrosion
- Check glow plug fuse and relay for continuity and operation
- Measure voltage at cylinder 5 glow plug connector during glow/ preheat cycle
- Measure resistance of cylinder 5 glow plug (engine cold) and compare to other cylinders
- Perform wiggle test on wiring/connector while monitoring voltage or checking for intermittent code
Signal parameters
- Glow plug resistance (cold): commonly around 0.2–3.0 ohms per plug (varies by engine). A very high or infinite reading = open circuit.
- Supply voltage at plug during preheat: near battery voltage (~11–13.5 V) while relay/driver is active
- Current draw per glow plug: typically single-digit to low‑tens of amps (depends on design); abnormally low current indicates open/high resistance
- Preheat duration: a few seconds to tens of seconds depending on ambient/temp and engine control strategy
Diagnostic algorithm
- Verify the code: retrieve freeze frame data and confirm P0675 is active and not a historical/one-time event.
- Visual inspection: examine glow plug #5 connector, wiring, and cylinder head area for corrosion, melted insulation, or damage.
- Check power/ground: with key on (engine off), verify the glow fuse and relay are intact and that power reaches the glow plug harness when preheat is requested.
- Resistance test: remove electrical connector and measure resistance of glow plug #5 to engine ground (engine cold). Compare value to known good plugs or service spec. Infinite or very high = open.
- Voltage during preheat: back-probe the connector and crank or use glow preheat function to verify voltage is supplied to the plug during the preheat cycle. No voltage suggests relay/driver/wiring fault.
- Current/driver test: if voltage is present but plug reads low current or high resistance, replace the glow plug. If no voltage and relay is good, trace continuity to PCM and test driver output per service manual.
- Wiggle/intermittent check: with monitor connected, wiggle harness and connectors to reproduce intermittent faults and inspect connector pins for tightness.
- Repair and verify: repair or replace faulty glow plug, connector, wiring, relay or fuse as required. Clear codes and perform multiple start cycles and a road/cold-start test to confirm the fault does not return.
- If wiring and components test good, consult manufacturer service data and test PCM driver output before replacing control module.
Likely causes
- Single glow plug has failed open
- Connector terminal corrosion or pushed-out pin
- Wiring harness damage near cylinder 5 (heat or mechanical abrasion)
- Failed glow plug relay or control module
- Loose or corroded ground at cylinder head
Fault status
Status
Open or high-resistance condition detected in glow plug circuit for cylinder 5. MIL set. May cause hard cold starts and increased smoke.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0675
LAND ROVER
P — Powertrain
Cylinder 5 glow plug open circuit
Views:
UK: 3
EN: 9
RU: 11
AI status
Completed
Completed
100%
Causes
- Failed glow plug (open or high resistance)
- Broken or corroded connector at glow plug
- Damaged wiring harness (open circuit, chafing, broken conductor)
- Poor or missing ground at glow plug or harness
- Blown fuse or faulty glow plug relay/driver
- Corroded terminal or water ingress in connector
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Hard cold starting or extended crank time
- White or increased smoke on cold start
- Rough idle or reduced smoothness after cold start
- Possible longer preheat lamp indication on dash
What to check
- Read freeze frame and pending codes; confirm P0675 is current
- Visually inspect glow plug connector, harness, and ground for damage or corrosion
- Check glow plug fuse and relay for continuity and operation
- Measure voltage at cylinder 5 glow plug connector during glow/ preheat cycle
- Measure resistance of cylinder 5 glow plug (engine cold) and compare to other cylinders
- Perform wiggle test on wiring/connector while monitoring voltage or checking for intermittent code
Signal parameters
- Glow plug resistance (cold): commonly around 0.2–3.0 ohms per plug (varies by engine). A very high or infinite reading = open circuit.
- Supply voltage at plug during preheat: near battery voltage (~11–13.5 V) while relay/driver is active
- Current draw per glow plug: typically single-digit to low‑tens of amps (depends on design); abnormally low current indicates open/high resistance
- Preheat duration: a few seconds to tens of seconds depending on ambient/temp and engine control strategy
Diagnostic algorithm
- Verify the code: retrieve freeze frame data and confirm P0675 is active and not a historical/one-time event.
- Visual inspection: examine glow plug #5 connector, wiring, and cylinder head area for corrosion, melted insulation, or damage.
- Check power/ground: with key on (engine off), verify the glow fuse and relay are intact and that power reaches the glow plug harness when preheat is requested.
- Resistance test: remove electrical connector and measure resistance of glow plug #5 to engine ground (engine cold). Compare value to known good plugs or service spec. Infinite or very high = open.
- Voltage during preheat: back-probe the connector and crank or use glow preheat function to verify voltage is supplied to the plug during the preheat cycle. No voltage suggests relay/driver/wiring fault.
- Current/driver test: if voltage is present but plug reads low current or high resistance, replace the glow plug. If no voltage and relay is good, trace continuity to PCM and test driver output per service manual.
- Wiggle/intermittent check: with monitor connected, wiggle harness and connectors to reproduce intermittent faults and inspect connector pins for tightness.
- Repair and verify: repair or replace faulty glow plug, connector, wiring, relay or fuse as required. Clear codes and perform multiple start cycles and a road/cold-start test to confirm the fault does not return.
- If wiring and components test good, consult manufacturer service data and test PCM driver output before replacing control module.
Likely causes
- Single glow plug has failed open
- Connector terminal corrosion or pushed-out pin
- Wiring harness damage near cylinder 5 (heat or mechanical abrasion)
- Failed glow plug relay or control module
- Loose or corroded ground at cylinder head
Fault status
Status
Open or high-resistance condition detected in glow plug circuit for cylinder 5. MIL set. May cause hard cold starts and increased smoke.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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