Cylinder 12 Glow Plug Circuit Range/Performance
P06C4 relates to cylinder 12 glow plug circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.
What you may notice
Symptoms
- 01Warning light may illuminate
- 02Related system function may be impaired
- 03Vehicle-specific symptoms vary
Where to look first
Common causes
- 01Mechanical timing or operating issue, sensor or actuator fault, connector or wiring damage
- 02Related wiring, connector, power or ground fault
- 03Vehicle-specific mechanical or control issue
A sensible sequence
Best diagnostic order
- 01Record stored and pending codes and freeze-frame data
- 02Record freeze-frame conditions; compare relevant live data and inspect mechanical operation, wiring and related fault codes before replacing parts.
- 03Confirm measured values against the vehicle service information
- 04Retest under the conditions that set the code
Step by step
What to check and repair
- 01Record freeze-frame conditions; compare relevant live data and inspect mechanical operation, wiring and related fault codes before replacing parts.
- 02Repair the verified cause and confirm the code does not return
Read the signals
Live-data clues
Relevant engine speed, temperature or timing data
- Typical behavior
- Consistent with the vehicle specifications and operating conditions
- Possible clue
- A dropout or implausible value can localize the fault
| Parameter | Typical behavior | What it can suggest |
|---|---|---|
| Relevant engine speed, temperature or timing data | Consistent with the vehicle specifications and operating conditions | A dropout or implausible value can localize the fault |
What P06C4 means
Cylinder 12 Glow Plug Circuit Range/Performance. This diagnostic trouble code identifies a detected condition; it does not by itself identify the failed part.
Diagnostic direction
Record freeze-frame conditions; compare relevant live data and inspect mechanical operation, wiring and related fault codes before replacing parts.
Before clearing the code
Record stored and pending codes and freeze-frame data. Confirm specifications and tests for the exact vehicle. Repair the verified cause, then repeat the appropriate monitor or drive cycle.