P0C6D records short, irregular disturbances on circuit B of the generator resolver: the signal flickers, loses samples or jumps, but each event is too brief to count as a hard low or high reading (P0C6B, P0C6C). Because the angle is computed from both windings, even short glitches on the second winding can make the inverter lose track of the rotor for a moment, which may be felt as a jolt or a brief break in charging. No manufacturer documents P0C6D publicly. Typical sources are a terminal with reduced contact pressure, a seal that lets moisture in, or a harness that moves against a bracket. GM's 2011-12 Volt shows how much vibration matters for resolver plugs (PIC6136A). Wiggle tests with live data help to localise such faults; P0C68 is the circuit A equivalent.
Medium severity. Can I keep driving?If the battery warning light comes on, you could get stranded. Turn off electrical accessories and go straight to a repair shop.
Symptoms
- Intermittent warning lamp
- Short jerks or charging interruptions in hybrid mode
- Fault hard to reproduce in the workshop
Most likely causes
- Terminal with reduced contact pressure in the circuit B connector
- Moisture entering through a damaged connector seal
- Harness moving against a bracket or edge and breaking contact
- Interference spikes from phase cables near the resolver lines
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- It can trigger limp mode.
- It affects emissions.
What each character of P0C6D means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- C: Subsystem depends on the code range
- 6D: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0C6D?
If the battery warning light comes on, you could get stranded. Turn off electrical accessories and go straight to a repair shop.
What causes code P0C6D?
The most common causes are: terminal with reduced contact pressure in the circuit B connector; moisture entering through a damaged connector seal; harness moving against a bracket or edge and breaking contact.
Related codes
- P0C69Generator Position Sensor Circuit B
- P0C6BGenerator Position Sensor Circuit B Low
- P0C6CGenerator Position Sensor Circuit B High
- P0C68Generator Position Sensor Circuit A Intermittent/Erratic
- P0A4FGenerator Position Sensor Circuit Intermittent
Sources
- static.nhtsa.gov: MC 10161001 9999
- law.cornell.edu: 13 CCR 1968.2
- en.wikipedia.org: Resolver (electrical)
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.