P269C — Exhaust Aftertreatment Glow Plug Control Performance
OBD2 code P269C flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug control performance). The car is usually drivable while you plan the repair. Common culprits: corroded glow plug connectors, burned-out glow plug, blown fuse in the glow plug circuit.
powertrain (engine/transmission)
Is it safe to drive?
Short-term driving is OK Safe to drive once the engine is started and warmed up. The main risk is cold-weather starting: with several dead plugs the engine may not start on a cold morning. Fix before winter.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P269C is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the diesel glow plug system for damage, corrosion, chafing or poor contact.
- Subsystem check Measure resistance of each glow plug — an open plug reads infinite resistance.
- Subsystem check Check voltage at the glow plug rail during the pre-glow phase.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P269C does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P269C (parts and labor, USD, independent shop rates): Replace one glow plug: $80–$200; Replace a full set of glow plugs: $250–$600; Replace the glow plug relay/module: $150–$450. Overall, fixing P269C usually costs between $80 and $600. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
How much does it cost to fix P269C?
Replace one glow plug — $80–$200; Replace a full set of glow plugs — $250–$600; Replace the glow plug relay/module — $150–$450. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
How do I diagnose P269C myself?
Start with a scan: confirm P269C, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the diesel glow plug system, and verify the suspect component against live data before buying parts.
What are the symptoms of P269C?
Drivers most often notice: hard starting in cold weather, white smoke after a cold start, Check Engine Light on, glow plug warning light staying on.
Is it safe to drive with P269C?
Safe to drive once the engine is started and warmed up. The main risk is cold-weather starting: with several dead plugs the engine may not start on a cold morning. Fix before winter.
What does OBD2 code P269C mean?
OBD2 code P269C flags a problem with the diesel glow plug system (exhaust aftertreatment glow plug control performance). The car is usually drivable while you plan the repair. Common culprits: corroded glow plug connectors, burned-out glow plug, blown fuse in the glow plug circuit.
What does P269C mean?
Seeing P269C on your scanner? The control unit has caught the diesel glow plug system operating outside its calibrated window. The formal description is “Exhaust Aftertreatment Glow Plug Control Performance”, and the code is grouped under powertrain (engine/transmission) faults.
To set P269C, the control module compares live readings of the diesel glow plug system against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.
What causes P269C?
- blown fuse in the glow plug circuit
- corroded glow plug connectors
- faulty glow plug relay or control module
- burned-out glow plug
Common symptoms of P269C
- hard starting in cold weather
- white smoke after a cold start
- Check Engine Light on
- glow plug warning light staying on
- rough idle until warmed up
How to diagnose P269C
- Connect an OBD2 scanner, confirm P269C is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the diesel glow plug system for damage, corrosion, chafing or poor contact.
- Measure resistance of each glow plug — an open plug reads infinite resistance.
- Check voltage at the glow plug rail during the pre-glow phase.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P269C does not return.
How to fix P269C
Start with the cheapest and most common causes before replacing expensive parts:
- Replace one glow plug — $80–$200
- Replace a full set of glow plugs — $250–$600
- Replace the glow plug relay/module — $150–$450
How much does it cost to fix P269C?
Repair cost depends on which component actually failed. Typical scenarios for P269C (parts and labor, USD, independent shop rates):
- Replace one glow plug: $80–$200
- Replace a full set of glow plugs: $250–$600
- Replace the glow plug relay/module: $150–$450
Overall, fixing P269C usually costs between $80 and $600. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P269C?
Safe to drive once the engine is started and warmed up. The main risk is cold-weather starting: with several dead plugs the engine may not start on a cold morning. Fix before winter.