Powertrain
generic / SAE
P00E1
Charge Air Cooler Coolant Temperature Sensor A Circuit High
CAC coolant temp sensor A signal voltage above expected range. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / E1
Possible causes
- Signal wire open high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–350 €
- Estimated time: 0.5–2 h
- Component: cac coolant temp sensor a
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012