OBD-II trouble code
P0276: Cylinder 6 Injector Circuit Low
SAE J2012 APR2002: cylinder 6 injector circuit low. On the 2008 G8 that is a short to ground, timed. The open is P0206. The printed pair is one injector.
Quick facts
- System
- Powertrain
- Category
- Fuel Injectors
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $768 – $953 (one fuel injector replacement, parts and labor, after the 2008 G8 circuit tests pass; the bank feed, the short to ground, and the ECM are outside this pair)
- DIY difficulty
- Shop recommended
Browse every code in P0200–P0299, or start from the full code library.
What does P0276 mean?
SAE J2012 APR2002 names P0276 Cylinder 6 Injector Circuit Low. P0277 is cylinder 6 circuit high. A VAG-group list prints 16660 P0276 as injector 6-N84, short-circuit to ground. No BMW S85 page for P0276 was in the set that was read, so the M5 3500 rpm line is not copied here.
The 2008 Pontiac G8 3.6L chart includes P0276. The ECM grounds each injector with a driver and watches a feedback voltage. The control circuits are pulled up to voltage inside the ECM. P0276 sets when that control circuit is shorted to ground for greater than 4 seconds or for a cumulative of 30 seconds. The open, greater than 4 seconds or a cumulative of 30 seconds, is P0206. The short to voltage is P0277. Running conditions: engine speed greater than 80 rpm, ignition voltage between 10 and 18 volts, the injector commanded on and off at least once. Type B. Misfire current counters are watched first and should not be incrementing. An intermittent is checked by moving the harness with the engine running while the circuit-status parameter is watched. OK or Indeterminate changing to Fault is the hit. That is a passenger or a recorded trace, not a driver staring at the tool.
Circuit testing starts with the multi-way disconnected, which sets P0201–P0206. Those opens are expected. The supply lamp on the ECM side has to light. The ignition feed also powers other components, so a shorted neighbor on the same feed has to be included. Control pin to B+ must not light. If it does, the control wire is tested for a short to ground and the ECM is replaced only when the wire tests normal. Control pin to ground must not light either; a light there is the short-to-voltage test and belongs to P0277. Then 2.6–4.6 volts. Out of range is the open test.
The 2007 LY7 chart's other bank is P0264, P0270, and P0276 together. That trio is the shared ignition feed, not three coils. A single P0276 on that chart goes to the one control wire. The G3 11–14 ohm window is a four-cylinder connector and is not this multi-way. The G8 coil figure is 12–16 ohms.
Common causes
- On the G8, cylinder 6's control circuit shorted to ground for greater than 4 seconds or a cumulative of 30 seconds
- On the 2007 LY7 chart, the shared ignition feed for the bank that includes cylinder 6 shorted to ground
- The ECM driver, after that control wire tests normal
Symptoms
- P0276 stored
- Misfire current counters incrementing, which the G8 verification says they should not
- Circuit status flipping from OK or Indeterminate to Fault while the harness is moved
- A control-pin lamp to B+ that lights
- P0206 stored when the fault is the open instead
Diagnostic steps
- 1.Watch misfire current counters before condemning the injector. They should not be climbing.
- 2.For an intermittent, move the harness with the engine running and watch circuit status. Have a second person, or record it. OK to Fault is the finding.
- 3.Ignition off, disconnect the multi-way. Expect P0201–P0206. Key on, supply lamp on the ECM side must light. Open fuse: feed shorted to ground, including anything else on that feed. Good fuse: open feed.
- 4.Control pin to B+ must stay dark. Light: short-to-ground test of cylinder 6's control wire, ECM only if the wire is normal. Control pin to ground lighting is P0277's test, not this one.
- 5.2.6–4.6 volts is the open check. Then the upper intake, the injector unplugged, OL between feed and control, less than 1 ohm in each leg, OL to ground.
- 6.If P0264, P0270, and P0276 are stored together on the LY7 chart, test the bank feed before three injectors are ordered.
- 7.12–16 ohms across the injector after the wires pass. Depressurize before removal. The printed pair is that one injector.
Repair cost
$768 – $953 (one fuel injector replacement, parts and labor, after the 2008 G8 circuit tests pass; the bank feed, the short to ground, and the ECM are outside this pair)
RepairPal prices one fuel-injector replacement, national page updated 3 September 2026, at $768–$953. Labor is $304–$446 and parts are $464–$507. That pair is the injector step 13 of the G8 chart reaches. It is not the feed repair and not the ECM. Diagnosis is a separate $125–$183 labor line. The 2026 F-150 figure of $1,130–$1,415 on the same estimator is outside this national pair. RepairPal says the intake comes off on the engines that job covers.
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DIY vs shop
Leave this one to a qualified shop. The barrier here is high-pressure fuel components, where residual pressure remains after shutdown and escaping fuel can penetrate skin. DIY attempts often produce a more expensive problem than the original code.